Tests results - Container so-openstack-adapter from pod onap-so-openstack-adapter-96f79d585-rsx9w logs

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              JVM Arguments:  -Dspring.profiles.active=basic -Djava.security.egd=file:/dev/./urandom -Dlogs_dir=./logs/openstack/ -Dlogging.config=/app/logback-spring.xml  -Dspring.config.additional-location=/app/config/override.yaml  -Djsse.enableSNIExtension=false

      .   ____          _            __ _ _
     /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
    ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
     \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
      '  |____| .__|_| |_|_| |_\__, | / / / /
     =========|_|==============|___/=/_/_/_/
     :: Spring Boot ::        (v2.3.7.RELEASE)

    2022-07-13T13:29:11.570Z||main|||||INFO|500||The following profiles are active: basic
    2022-07-13T13:29:24.173Z||main|||||INFO|500||Starting service [Tomcat]
    2022-07-13T13:29:24.178Z||main|||||INFO|500||Starting Servlet engine: [Apache Tomcat/9.0.41]
    2022-07-13T13:29:24.311Z||main|||||INFO|500||Initializing Spring embedded WebApplicationContext
    2022-07-13T13:29:24.730Z||main|||||INFO|500||catdb-pool - Starting...
    2022-07-13T13:29:25.015Z||main|||||INFO|500||catdb-pool - Start completed.
    2022-07-13T13:29:25.692Z||main|||||INFO|500||HHH000204: Processing PersistenceUnitInfo [name: catalogDB]
    2022-07-13T13:29:25.890Z||main|||||INFO|500||HHH000412: Hibernate ORM core version 5.4.25.Final
    2022-07-13T13:29:27.128Z||main|||||INFO|500||HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
    2022-07-13T13:29:31.199Z||main|||||INFO|500||HHH000400: Using dialect: org.hibernate.dialect.MariaDB103Dialect
    2022-07-13T13:29:32.123Z||main|||||WARN|500||HHH000491: The [heatTemplates] association in the [org.onap.so.db.catalog.beans.VnfResource] entity uses both @NotFound(action = NotFoundAction.IGNORE) and FetchType.LAZY. The NotFoundAction.IGNORE @ManyToOne and @OneToOne associations are always fetched eagerly.
    2022-07-13T13:29:36.187Z||main|||||INFO|500||HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
    2022-07-13T13:29:44.921Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:44.936Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:44.939Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:44.941Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:44.949Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:44.955Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.016Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.017Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.018Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.018Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.018Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.020Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.025Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.025Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.025Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.025Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.026Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.028Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.043Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.044Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.044Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.044Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.045Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.047Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.059Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.059Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.060Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.060Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.063Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.064Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.092Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.093Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.093Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.094Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.094Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.112Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.120Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.120Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.121Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.121Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.121Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.132Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.142Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.143Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.144Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.144Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.144Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.150Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.164Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.168Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.169Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.170Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.171Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.173Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.179Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.180Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.180Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.180Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.181Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.187Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.201Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.204Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.204Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.205Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.207Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.210Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.235Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.237Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.237Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.238Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.239Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.242Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.252Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.253Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.254Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.255Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.256Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.276Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.293Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.293Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.293Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.294Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.294Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.296Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.319Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.321Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.321Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.321Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.321Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.325Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.336Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.337Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.355Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.355Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.361Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.363Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.375Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.375Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.375Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.376Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.376Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.378Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.388Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.390Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.390Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.391Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.391Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.393Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.425Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.436Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.437Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.437Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.437Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.439Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.463Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.464Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.464Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.464Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.465Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.478Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.483Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.484Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.484Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.485Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.485Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.488Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.499Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.499Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.500Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.500Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.500Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.503Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.590Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.591Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.591Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.591Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.592Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.593Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.618Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.620Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.620Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.620Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.621Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.622Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.667Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.667Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.669Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.670Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.670Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.668Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.670Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.667Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.671Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.671Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.671Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.672Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.672Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.672Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.672Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.673Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.673Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.674Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.667Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.667Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.675Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.675Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.678Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.683Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.684Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.684Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.684Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.684Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.686Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.686Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.686Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.687Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.687Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.688Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.693Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.694Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.694Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.694Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.694Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.695Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.700Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.702Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.702Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.702Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.703Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.703Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.705Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.710Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.711Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.711Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.711Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.712Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.713Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.718Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.719Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.720Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.721Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.722Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.730Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.735Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.740Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.742Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.743Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.762Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.763Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.764Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.764Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.764Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.766Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.771Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.778Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.787Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.788Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.788Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.788Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.789Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.791Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.795Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.796Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.796Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.797Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.797Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.800Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.807Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.808Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.808Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.808Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.809Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.809Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.812Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.826Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.827Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.827Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.827Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.828Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.830Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.843Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.845Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.845Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.845Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.846Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.849Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.853Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.855Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.856Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.856Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.856Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.857Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.857Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.859Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.867Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.868Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.868Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.868Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.869Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.869Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.872Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.881Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.881Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.882Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.882Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.883Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.885Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.891Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.898Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.898Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.899Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.899Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.900Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.902Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.909Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.914Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.916Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.916Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.917Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.917Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.919Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.928Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.927Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.928Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.929Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.929Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.930Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.930Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.933Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.947Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.948Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.948Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.949Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.949Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.952Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.957Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.957Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.958Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.961Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.962Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.963Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.974Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.976Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.976Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.976Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.976Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.977Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:45.978Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:45.987Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.988Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.990Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:45.993Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:45.993Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:45.993Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.994Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:45.994Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:46.002Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:46.003Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.015Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.026Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.020Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:46.026Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:46.027Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:46.027Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:46.027Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:46.029Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:46.055Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:46.056Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:46.056Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.056Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:46.057Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:46.057Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:46.059Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:46.073Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:46.074Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:46.074Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:46.074Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:46.074Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:46.076Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:46.085Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-13T13:29:46.086Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-13T13:29:46.087Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-07-13T13:29:46.087Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-13T13:29:46.087Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-13T13:29:46.088Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-13T13:29:46.122Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.141Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.152Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.156Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.158Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.283Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.286Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.287Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.287Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.290Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.294Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.290Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.291Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.295Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.297Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.298Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.300Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.300Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.309Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.311Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.314Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.314Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.316Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.316Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.321Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.322Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.322Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.325Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.324Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.343Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.350Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.350Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.357Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.371Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.376Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.418Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.419Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.435Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.453Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.472Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.478Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.487Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.547Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.592Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.604Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.613Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.616Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.616Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.621Z||main|||||WARN|500||spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
    2022-07-13T13:29:46.623Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.636Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.700Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.703Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.708Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.739Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:46.747Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.391Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.395Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.398Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.399Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.407Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.413Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.414Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.415Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.417Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.426Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.427Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.427Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.427Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.432Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.437Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.438Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.441Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.441Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.442Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.444Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.445Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.441Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.448Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.451Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.451Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.454Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.455Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.455Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.466Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.487Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.488Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.490Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.515Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.523Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.538Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.538Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.571Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.629Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.735Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.736Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.737Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.740Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.740Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.743Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.743Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.795Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.801Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.805Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.825Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:47.839Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.454Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.454Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.458Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.462Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.475Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.482Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.486Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.487Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.491Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.493Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.498Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.498Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.500Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.501Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.511Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.513Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.518Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.526Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.526Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.526Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.527Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.529Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.529Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.533Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.534Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.538Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.538Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.539Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.538Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.568Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.572Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.580Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.583Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.594Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.601Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.643Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.643Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.718Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.789Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.790Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.791Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.800Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.800Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.806Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.826Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.835Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.837Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.861Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.907Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:49.907Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:50.557Z||main|||||WARN|500||---
    2022-07-13T13:29:50.557Z||main|||||WARN|500||Spring Data REST HAL Browser is deprecated! Prefer the HAL Explorer (artifactId: spring-data-rest-hal-explorer)!
    2022-07-13T13:29:50.557Z||main|||||WARN|500||---
    2022-07-13T13:29:51.399Z||main|||||INFO|500||Setting the server's publish address to be /api
    2022-07-13T13:29:52.244Z||main|||||DEBUG|500||Injecting class org.onap.so.security.SoBasicHttpSecurityConfigurer configuration ...
    2022-07-13T13:29:53.516Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.558Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.577Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.580Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.582Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.607Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.612Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.613Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.616Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.616Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.617Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.625Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.625Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.626Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.626Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.628Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.629Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.629Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.629Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.630Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.630Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.630Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.636Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.642Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.642Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.643Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.642Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.646Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.654Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.654Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.656Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.659Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.687Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.693Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.693Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.694Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.709Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.796Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.841Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.849Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.850Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.856Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.867Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.874Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.875Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.906Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.906Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.935Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.957Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:53.967Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:29:58.174Z||main|||||INFO|500||Started MsoOpenstackAdaptersApplication in 51.248 seconds (JVM running for 54.082)
    2022-07-13T13:30:01.563Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.604Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.609Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.616Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.621Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.652Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.653Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.659Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.665Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.670Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.672Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.675Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.675Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.679Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.679Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.682Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.686Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.693Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.694Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.696Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.697Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.701Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.703Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.702Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.703Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.705Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.706Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.710Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.717Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.722Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.728Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.734Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.738Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.745Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.749Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.750Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.753Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.844Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.890Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.899Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.901Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.907Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.931Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.939Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.940Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.968Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.982Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:01.984Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:02.015Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:02.033Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.635Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.652Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.667Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.678Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.687Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.710Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.714Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.715Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.716Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.717Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.729Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.732Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.734Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.735Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.737Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.738Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.742Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.743Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.744Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.744Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.750Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.756Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.764Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.766Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.766Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.766Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.767Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.770Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.770Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.775Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.783Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.783Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.794Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.794Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.817Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.819Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.819Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.871Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.926Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.926Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.948Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.954Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.968Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.980Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:17.990Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:18.015Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:18.026Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:18.046Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:18.060Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:18.100Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.677Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.691Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.699Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.718Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.726Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.750Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.753Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.759Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.766Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.766Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.772Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.790Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.792Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.792Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.794Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.795Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.797Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.798Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.802Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.804Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.808Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.825Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.827Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.828Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.831Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.831Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.831Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.833Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.833Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.835Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.837Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.843Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.846Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.854Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.856Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.877Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.890Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.920Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.982Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:49.987Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.002Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.004Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.024Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.030Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.057Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.058Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.059Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.092Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.109Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:30:50.151Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:34:51.264Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection termination
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection termination
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-13T13:40:02.779Z||http-nio-8087-exec-1|||||INFO|500||Initializing Spring DispatcherServlet 'dispatcherServlet'