Tests results - Container so-openstack-adapter from pod onap-so-openstack-adapter-96f79d585-s66fg 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)

    2022-07-20T09:25:31.805Z||main|||||INFO|500||The following profiles are active: basic
    2022-07-20T09:25:45.501Z||main|||||INFO|500||Starting service [Tomcat]
    2022-07-20T09:25:45.502Z||main|||||INFO|500||Starting Servlet engine: [Apache Tomcat/9.0.41]
    2022-07-20T09:25:45.640Z||main|||||INFO|500||Initializing Spring embedded WebApplicationContext
    2022-07-20T09:25:46.004Z||main|||||INFO|500||catdb-pool - Starting...
    2022-07-20T09:25:46.256Z||main|||||INFO|500||catdb-pool - Start completed.
    2022-07-20T09:25:47.036Z||main|||||INFO|500||HHH000204: Processing PersistenceUnitInfo [name: catalogDB]
    2022-07-20T09:25:47.208Z||main|||||INFO|500||HHH000412: Hibernate ORM core version 5.4.25.Final
    2022-07-20T09:25:47.895Z||main|||||INFO|500||HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
    2022-07-20T09:25:49.904Z||main|||||INFO|500||HHH000400: Using dialect: org.hibernate.dialect.MariaDB103Dialect
    2022-07-20T09:25:50.687Z||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.
    2022-07-20T09:25:53.164Z||main|||||INFO|500||HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
    2022-07-20T09:26:01.660Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.666Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.670Z||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]
    2022-07-20T09:26:01.672Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.673Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.677Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.736Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.737Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.737Z||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]
    2022-07-20T09:26:01.737Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.737Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.739Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.746Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.747Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.748Z||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]
    2022-07-20T09:26:01.748Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.748Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.764Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.793Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.793Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.794Z||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]
    2022-07-20T09:26:01.794Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.795Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.815Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.849Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.850Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.850Z||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]
    2022-07-20T09:26:01.853Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.853Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.855Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.885Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.888Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.889Z||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]
    2022-07-20T09:26:01.889Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.889Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.891Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.896Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.896Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.897Z||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]
    2022-07-20T09:26:01.897Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.897Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.899Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.904Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.904Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.904Z||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]
    2022-07-20T09:26:01.905Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.905Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.906Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.916Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.917Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.917Z||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]
    2022-07-20T09:26:01.917Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.918Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.920Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.924Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.925Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.925Z||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]
    2022-07-20T09:26:01.926Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.926Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.930Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:01.941Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:01.942Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:01.942Z||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]
    2022-07-20T09:26:01.943Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:01.944Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:01.945Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.024Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.025Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.025Z||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]
    2022-07-20T09:26:02.025Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.025Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.027Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.034Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.040Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.040Z||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]
    2022-07-20T09:26:02.040Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.040Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.042Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.051Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.052Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.053Z||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]
    2022-07-20T09:26:02.053Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.053Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.057Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.066Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.067Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.067Z||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]
    2022-07-20T09:26:02.068Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.068Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.070Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.083Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.083Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.084Z||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]
    2022-07-20T09:26:02.085Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.085Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.090Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.097Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.097Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.098Z||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]
    2022-07-20T09:26:02.098Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.104Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.105Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.122Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.122Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.122Z||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]
    2022-07-20T09:26:02.122Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.123Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.124Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.130Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.130Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.131Z||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]
    2022-07-20T09:26:02.131Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.131Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.133Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.142Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.142Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.148Z||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]
    2022-07-20T09:26:02.148Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.149Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.150Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.156Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.157Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.157Z||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]
    2022-07-20T09:26:02.157Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.157Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.169Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.181Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.182Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.182Z||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]
    2022-07-20T09:26:02.191Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.191Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.195Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.204Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.205Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.205Z||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]
    2022-07-20T09:26:02.206Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.206Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.209Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.215Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.217Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.217Z||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]
    2022-07-20T09:26:02.218Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.218Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.220Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.224Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.225Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.225Z||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]
    2022-07-20T09:26:02.225Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.225Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.227Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.231Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.231Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.232Z||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]
    2022-07-20T09:26:02.232Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.232Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.234Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.237Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.238Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.238Z||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]
    2022-07-20T09:26:02.238Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.238Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.240Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.246Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.246Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.247Z||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]
    2022-07-20T09:26:02.247Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.247Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.249Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.257Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.257Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.258Z||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]
    2022-07-20T09:26:02.258Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.258Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.260Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.263Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.263Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.264Z||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]
    2022-07-20T09:26:02.264Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.264Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.268Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.274Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.274Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.275Z||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]
    2022-07-20T09:26:02.275Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.276Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.279Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.295Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.295Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.296Z||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]
    2022-07-20T09:26:02.296Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.296Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.297Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.302Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.302Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.302Z||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]
    2022-07-20T09:26:02.302Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.302Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.304Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.310Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.311Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.312Z||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]
    2022-07-20T09:26:02.312Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.312Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.316Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.329Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.330Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.330Z||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]
    2022-07-20T09:26:02.331Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.331Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.333Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.351Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.352Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.352Z||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]
    2022-07-20T09:26:02.353Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.353Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.355Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.395Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.398Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.405Z||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]
    2022-07-20T09:26:02.406Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.406Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.408Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.413Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.415Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.415Z||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]
    2022-07-20T09:26:02.416Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.427Z||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
    2022-07-20T09:26:02.416Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.427Z||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
    2022-07-20T09:26:02.423Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.427Z||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
    2022-07-20T09:26:02.426Z||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
    2022-07-20T09:26:02.426Z||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
    2022-07-20T09:26:02.426Z||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
    2022-07-20T09:26:02.426Z||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
    2022-07-20T09:26:02.427Z||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
    2022-07-20T09:26:02.426Z||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
    2022-07-20T09:26:02.426Z||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
    2022-07-20T09:26:02.425Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.425Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.425Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.425Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.425Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.432Z||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
    2022-07-20T09:26:02.423Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.424Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.433Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.424Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.424Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.424Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.424Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.424Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.423Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.423Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.423Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.420Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.420Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.420Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.420Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.420Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.420Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.416Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.439Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.441Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.445Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.446Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.446Z||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]
    2022-07-20T09:26:02.446Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.446Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.447Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.451Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.451Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.451Z||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]
    2022-07-20T09:26:02.452Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.452Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.453Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.457Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.457Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.457Z||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]
    2022-07-20T09:26:02.457Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.457Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.457Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.459Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.463Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.463Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.463Z||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]
    2022-07-20T09:26:02.463Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.464Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.465Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.468Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.468Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.468Z||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]
    2022-07-20T09:26:02.469Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.469Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.470Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.470Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.477Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.477Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.477Z||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]
    2022-07-20T09:26:02.478Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.478Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.479Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.482Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.482Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.483Z||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]
    2022-07-20T09:26:02.484Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.484Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.485Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.489Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.490Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.490Z||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]
    2022-07-20T09:26:02.490Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.490Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.494Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.497Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.498Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.498Z||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]
    2022-07-20T09:26:02.498Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.498Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.499Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.504Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.504Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.504Z||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]
    2022-07-20T09:26:02.505Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.505Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.506Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.510Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.510Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.510Z||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]
    2022-07-20T09:26:02.510Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.511Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.512Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.514Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.515Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-07-20T09:26:02.515Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-07-20T09:26:02.516Z||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]
    2022-07-20T09:26:02.516Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-07-20T09:26:02.516Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-07-20T09:26:02.517Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-07-20T09:26:02.536Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.538Z||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
    2022-07-20T09:26:02.539Z||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
    2022-07-20T09:26:02.545Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.548Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.550Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.570Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.582Z||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
    2022-07-20T09:26:02.582Z||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
    2022-07-20T09:26:02.593Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.663Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:02.870Z||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
    2022-07-20T09:26:03.076Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.077Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.077Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.077Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.078Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.079Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.085Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.087Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.085Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.088Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.094Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.094Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.094Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.095Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.094Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.094Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.097Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.102Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.103Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.103Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.104Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.104Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.106Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.107Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.107Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.108Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.109Z||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
    2022-07-20T09:26:03.110Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.110Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.110Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.107Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.114Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.116Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.117Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.117Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.117Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.117Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.120Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.120Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.121Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.123Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.124Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.126Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.126Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.132Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.134Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.140Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.149Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.163Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:03.262Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.140Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.170Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.170Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.174Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.176Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.176Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.179Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.182Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.189Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.190Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.191Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.206Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.215Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.217Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.218Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.220Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.220Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.221Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.225Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.226Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.229Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.229Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.232Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.232Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.233Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.237Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.238Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.239Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.239Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.240Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.240Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.240Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.240Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.241Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.243Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.244Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.245Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.245Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.245Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.246Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.246Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.246Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.246Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.266Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.266Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.267Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.275Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.276Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.299Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:04.309Z||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
    2022-07-20T09:26:06.113Z||main|||||WARN|500||---
    2022-07-20T09:26:06.113Z||main|||||WARN|500||Spring Data REST HAL Browser is deprecated! Prefer the HAL Explorer (artifactId: spring-data-rest-hal-explorer)!
    2022-07-20T09:26:06.113Z||main|||||WARN|500||---
    2022-07-20T09:26:06.193Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.205Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.223Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.277Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.282Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.287Z||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
    2022-07-20T09:26:06.288Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.298Z||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
    2022-07-20T09:26:06.299Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.301Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.313Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.319Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.319Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.323Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.334Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.340Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.340Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.343Z||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
    2022-07-20T09:26:06.344Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.345Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.348Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.351Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.352Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.353Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.355Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.358Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.359Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.360Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.360Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.360Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.361Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.361Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.363Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.364Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.365Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.368Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.369Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.369Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.369Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.370Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.371Z||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
    2022-07-20T09:26:06.387Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.388Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.389Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.389Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.389Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.390Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:06.391Z||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
    2022-07-20T09:26:06.391Z||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
    2022-07-20T09:26:06.393Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:07.026Z||main|||||INFO|500||Setting the server's publish address to be /api
    2022-07-20T09:26:07.706Z||main|||||DEBUG|500||Injecting class org.onap.so.security.SoBasicHttpSecurityConfigurer configuration ...
    2022-07-20T09:26:10.263Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.275Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.339Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.350Z||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
    2022-07-20T09:26:10.456Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.457Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.457Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.457Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.459Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.459Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.465Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.477Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.484Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.484Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.485Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.486Z||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
    2022-07-20T09:26:10.486Z||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
    2022-07-20T09:26:10.491Z||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
    2022-07-20T09:26:10.494Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.494Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.495Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.505Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.507Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.507Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.511Z||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
    2022-07-20T09:26:10.515Z||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
    2022-07-20T09:26:10.520Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.527Z||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
    2022-07-20T09:26:10.531Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.531Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.538Z||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
    2022-07-20T09:26:10.538Z||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
    2022-07-20T09:26:10.544Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.555Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.555Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.555Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.555Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.556Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.556Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.559Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.559Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.560Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.560Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.562Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.565Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.564Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.565Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.567Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.565Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:10.565Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:13.062Z||main|||||INFO|500||Started MsoOpenstackAdaptersApplication in 44.815 seconds (JVM running for 47.263)
    2022-07-20T09:26:18.328Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.341Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.384Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.403Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.524Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.547Z||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
    2022-07-20T09:26:18.552Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.567Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.569Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.567Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.574Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.583Z||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
    2022-07-20T09:26:18.584Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.586Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.607Z||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
    2022-07-20T09:26:18.583Z||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
    2022-07-20T09:26:18.583Z||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
    2022-07-20T09:26:18.611Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.587Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.599Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.617Z||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
    2022-07-20T09:26:18.602Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.603Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.603Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.605Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.627Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.629Z||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
    2022-07-20T09:26:18.627Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.643Z||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
    2022-07-20T09:26:18.644Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.671Z||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
    2022-07-20T09:26:18.676Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.673Z||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
    2022-07-20T09:26:18.678Z||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
    2022-07-20T09:26:18.682Z||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
    2022-07-20T09:26:18.687Z||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
    2022-07-20T09:26:18.687Z||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
    2022-07-20T09:26:18.688Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.688Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.694Z||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
    2022-07-20T09:26:18.695Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.698Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.698Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.699Z||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
    2022-07-20T09:26:18.701Z||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
    2022-07-20T09:26:18.707Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.708Z||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
    2022-07-20T09:26:18.707Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:18.709Z||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
    2022-07-20T09:26:18.707Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.387Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.410Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.450Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.471Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.596Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.606Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.613Z||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
    2022-07-20T09:26:34.625Z||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
    2022-07-20T09:26:34.626Z||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
    2022-07-20T09:26:34.626Z||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
    2022-07-20T09:26:34.641Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.654Z||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
    2022-07-20T09:26:34.661Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.662Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.676Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.676Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.676Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.681Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.683Z||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
    2022-07-20T09:26:34.683Z||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
    2022-07-20T09:26:34.683Z||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
    2022-07-20T09:26:34.683Z||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
    2022-07-20T09:26:34.692Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.700Z||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
    2022-07-20T09:26:34.707Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.711Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.712Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.712Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.740Z||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
    2022-07-20T09:26:34.749Z||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
    2022-07-20T09:26:34.780Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.790Z||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
    2022-07-20T09:26:34.790Z||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
    2022-07-20T09:26:34.786Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.792Z||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
    2022-07-20T09:26:34.797Z||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
    2022-07-20T09:26:34.807Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.808Z||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
    2022-07-20T09:26:34.808Z||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
    2022-07-20T09:26:34.812Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.812Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.813Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.814Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.816Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.815Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:26:34.835Z||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
    2022-07-20T09:26:34.837Z||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
    2022-07-20T09:26:34.837Z||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
    2022-07-20T09:26:34.837Z||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
    2022-07-20T09:26:34.838Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.441Z||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
    2022-07-20T09:27:06.469Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.500Z||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
    2022-07-20T09:27:06.524Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.649Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.681Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.706Z||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
    2022-07-20T09:27:06.720Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.731Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.732Z||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
    2022-07-20T09:27:06.733Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.734Z||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
    2022-07-20T09:27:06.736Z||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
    2022-07-20T09:27:06.750Z||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
    2022-07-20T09:27:06.751Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.755Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.756Z||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
    2022-07-20T09:27:06.757Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.766Z||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
    2022-07-20T09:27:06.767Z||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
    2022-07-20T09:27:06.768Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.769Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.770Z||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
    2022-07-20T09:27:06.774Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.779Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.780Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.803Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.803Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.834Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.838Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.902Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.908Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.909Z||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
    2022-07-20T09:27:06.916Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.917Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.917Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.917Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.917Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.918Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.923Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.929Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.930Z||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
    2022-07-20T09:27:06.930Z||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
    2022-07-20T09:27:06.930Z||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
    2022-07-20T09:27:06.934Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.942Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.949Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.950Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:27:06.954Z||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
    2022-07-20T09:27:06.959Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-07-20T09:35:58.106Z||http-nio-8087-exec-1|||||INFO|500||Initializing Spring DispatcherServlet 'dispatcherServlet'