Tests results - Container so-openstack-adapter from pod onap-so-openstack-adapter-77644f74cd-9znk5 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)

    2022-09-10T23:09:19.276Z||main|||||INFO|500||The following profiles are active: basic
    2022-09-10T23:09:34.630Z||main|||||INFO|500||Starting service [Tomcat]
    2022-09-10T23:09:34.631Z||main|||||INFO|500||Starting Servlet engine: [Apache Tomcat/9.0.41]
    2022-09-10T23:09:35.363Z||main|||||INFO|500||Initializing Spring embedded WebApplicationContext
    2022-09-10T23:09:36.138Z||main|||||INFO|500||catdb-pool - Starting...
    2022-09-10T23:09:36.350Z||main|||||INFO|500||catdb-pool - Start completed.
    2022-09-10T23:09:36.890Z||main|||||INFO|500||HHH000204: Processing PersistenceUnitInfo [name: catalogDB]
    2022-09-10T23:09:37.073Z||main|||||INFO|500||HHH000412: Hibernate ORM core version 5.4.25.Final
    2022-09-10T23:09:37.833Z||main|||||INFO|500||HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
    2022-09-10T23:09:41.471Z||main|||||INFO|500||HHH000400: Using dialect: org.hibernate.dialect.MariaDB103Dialect
    2022-09-10T23:09:42.323Z||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.
    2022-09-10T23:09:44.541Z||main|||||INFO|500||HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
    2022-09-10T23:09:52.592Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.599Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.601Z||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]
    2022-09-10T23:09:52.605Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.606Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.610Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.653Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.655Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.655Z||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]
    2022-09-10T23:09:52.656Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.656Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.658Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.664Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.665Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.665Z||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]
    2022-09-10T23:09:52.666Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.666Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.668Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.677Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.677Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.677Z||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]
    2022-09-10T23:09:52.678Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.678Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.679Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.687Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.687Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.687Z||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]
    2022-09-10T23:09:52.687Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.688Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.690Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.706Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.707Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.707Z||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]
    2022-09-10T23:09:52.708Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.708Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.712Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.717Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.717Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.718Z||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]
    2022-09-10T23:09:52.718Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.721Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.723Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.727Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.728Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.728Z||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]
    2022-09-10T23:09:52.728Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.728Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.730Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.736Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.736Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.736Z||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]
    2022-09-10T23:09:52.736Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.737Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.738Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.743Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.744Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.744Z||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]
    2022-09-10T23:09:52.744Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.744Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.746Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.750Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.751Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.751Z||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]
    2022-09-10T23:09:52.751Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.752Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.754Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.759Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.759Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.759Z||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]
    2022-09-10T23:09:52.760Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.760Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.761Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.765Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.766Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.766Z||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]
    2022-09-10T23:09:52.766Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.766Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.768Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.814Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.815Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.815Z||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]
    2022-09-10T23:09:52.816Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.816Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.818Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.824Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.825Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.825Z||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]
    2022-09-10T23:09:52.825Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.825Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.828Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.832Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.833Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.834Z||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]
    2022-09-10T23:09:52.834Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.837Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.839Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.843Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.844Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.844Z||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]
    2022-09-10T23:09:52.844Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.844Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.846Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.850Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.850Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.851Z||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]
    2022-09-10T23:09:52.851Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.851Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.853Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.857Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.858Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.858Z||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]
    2022-09-10T23:09:52.858Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.858Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.860Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.869Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.869Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.869Z||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]
    2022-09-10T23:09:52.869Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.870Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.871Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.876Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.877Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.877Z||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]
    2022-09-10T23:09:52.877Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.877Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.879Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.886Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.887Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.887Z||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]
    2022-09-10T23:09:52.887Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.887Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.889Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.905Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.905Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.906Z||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]
    2022-09-10T23:09:52.906Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.906Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.909Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.914Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.914Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.915Z||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]
    2022-09-10T23:09:52.915Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.916Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.918Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.922Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.925Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.925Z||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]
    2022-09-10T23:09:52.926Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.926Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.927Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.932Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.932Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.933Z||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]
    2022-09-10T23:09:52.933Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.934Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.935Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.939Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.939Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.940Z||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]
    2022-09-10T23:09:52.940Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.940Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.942Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.945Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.946Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.948Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.948Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.949Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.950Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.954Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.954Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.955Z||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]
    2022-09-10T23:09:52.955Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.956Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.957Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.961Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.961Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.962Z||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]
    2022-09-10T23:09:52.962Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.962Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.964Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.974Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.975Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.975Z||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]
    2022-09-10T23:09:52.976Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.976Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.979Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.986Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.986Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.987Z||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]
    2022-09-10T23:09:52.987Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.987Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.989Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:52.994Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:52.995Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:52.995Z||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]
    2022-09-10T23:09:52.996Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:52.996Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:52.998Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.004Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.005Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.005Z||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]
    2022-09-10T23:09:53.005Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.006Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.007Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.013Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.013Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.014Z||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]
    2022-09-10T23:09:53.014Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.014Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.016Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.024Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.024Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.025Z||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]
    2022-09-10T23:09:53.025Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.025Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.027Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.030Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.031Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.031Z||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]
    2022-09-10T23:09:53.031Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.031Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.033Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.037Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.037Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.038Z||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]
    2022-09-10T23:09:53.038Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.038Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.040Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.044Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.044Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.044Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.045Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.045Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.046Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.050Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.051Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.052Z||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]
    2022-09-10T23:09:53.052Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.053Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.054Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.060Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.060Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.060Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormatProvider[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.061Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.061Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.062Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.066Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.067Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.067Z||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]
    2022-09-10T23:09:53.067Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.068Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.070Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.074Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.074Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.075Z||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]
    2022-09-10T23:09:53.075Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.075Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.076Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.079Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.080Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.080Z||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]
    2022-09-10T23:09:53.080Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.081Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.082Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.085Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.086Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.086Z||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]
    2022-09-10T23:09:53.086Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.087Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.088Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.091Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.092Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.092Z||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]
    2022-09-10T23:09:53.092Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.093Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.094Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.101Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.101Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.102Z||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]
    2022-09-10T23:09:53.102Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.102Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.103Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.107Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.107Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.107Z||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]
    2022-09-10T23:09:53.107Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.108Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.109Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.112Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.113Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.113Z||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]
    2022-09-10T23:09:53.113Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.113Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.114Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.118Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormatProvider[name = application/json]
    2022-09-10T23:09:53.118Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.json.JacksonJsonDataFormat[name = application/json]
    2022-09-10T23:09:53.118Z||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]
    2022-09-10T23:09:53.118Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.serializable.SerializableDataFormat[name = application/x-java-serialized-object]
    2022-09-10T23:09:53.119Z||main|||||INFO|500||TASK/CLIENT-01026 Discovered data format provider: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormatProvider[name = application/xml]
    2022-09-10T23:09:53.120Z||main|||||INFO|500||TASK/CLIENT-01025 Discovered data format: org.camunda.bpm.client.variable.impl.format.xml.DomXmlDataFormat[name = application/xml]
    2022-09-10T23:09:53.222Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.230Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.230Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.230Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.231Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.229Z||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
    2022-09-10T23:09:53.228Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.228Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.228Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.228Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.233Z||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
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.228Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.222Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.228Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.222Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.227Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.226Z||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
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.226Z||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
    2022-09-10T23:09:53.222Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.226Z||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
    2022-09-10T23:09:53.226Z||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
    2022-09-10T23:09:53.226Z||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
    2022-09-10T23:09:53.226Z||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
    2022-09-10T23:09:53.223Z||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
    2022-09-10T23:09:53.225Z||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
    2022-09-10T23:09:53.226Z||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
    2022-09-10T23:09:53.245Z||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
    2022-09-10T23:09:53.289Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.290Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.290Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.495Z||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
    2022-09-10T23:09:53.907Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.958Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.960Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.961Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.962Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.962Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.978Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.990Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.991Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.010Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.018Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.026Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.034Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.062Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.077Z||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
    2022-09-10T23:09:54.093Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.096Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.101Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.102Z||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
    2022-09-10T23:09:54.106Z||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
    2022-09-10T23:09:54.124Z||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
    2022-09-10T23:09:54.125Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.125Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.134Z||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
    2022-09-10T23:09:54.136Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.172Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.173Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.180Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.183Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.190Z||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
    2022-09-10T23:09:54.194Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.198Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.206Z||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
    2022-09-10T23:09:54.209Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.210Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.211Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.226Z||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
    2022-09-10T23:09:54.234Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.266Z||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
    2022-09-10T23:09:54.266Z||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
    2022-09-10T23:09:54.279Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.286Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:53.963Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.323Z||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
    2022-09-10T23:09:54.401Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.406Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.401Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.422Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.450Z||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
    2022-09-10T23:09:54.445Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:54.982Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.003Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.024Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.025Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.038Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.043Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.044Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.055Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.067Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.078Z||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
    2022-09-10T23:09:55.083Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.086Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.092Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.110Z||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
    2022-09-10T23:09:55.149Z||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
    2022-09-10T23:09:55.169Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.170Z||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
    2022-09-10T23:09:55.172Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.172Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.176Z||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
    2022-09-10T23:09:55.177Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.177Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.177Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.179Z||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
    2022-09-10T23:09:55.203Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.203Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.249Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.250Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.255Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.255Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.256Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.259Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.276Z||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
    2022-09-10T23:09:55.278Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.279Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.279Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.292Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.295Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.301Z||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
    2022-09-10T23:09:55.305Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.317Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.322Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.347Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.390Z||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
    2022-09-10T23:09:55.434Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.439Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.499Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.504Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.521Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:55.552Z||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
    2022-09-10T23:09:57.058Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.085Z||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
    2022-09-10T23:09:57.116Z||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
    2022-09-10T23:09:57.117Z||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
    2022-09-10T23:09:57.122Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.127Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.127Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.128Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.128Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.128Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.129Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.145Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.173Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.190Z||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
    2022-09-10T23:09:57.206Z||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
    2022-09-10T23:09:57.225Z||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
    2022-09-10T23:09:57.237Z||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
    2022-09-10T23:09:57.237Z||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
    2022-09-10T23:09:57.238Z||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
    2022-09-10T23:09:57.239Z||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
    2022-09-10T23:09:57.255Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.256Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.263Z||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
    2022-09-10T23:09:57.265Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.266Z||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
    2022-09-10T23:09:57.267Z||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
    2022-09-10T23:09:57.326Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.329Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.330Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.331Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.333Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.334Z||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
    2022-09-10T23:09:57.334Z||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
    2022-09-10T23:09:57.339Z||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
    2022-09-10T23:09:57.342Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.343Z||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
    2022-09-10T23:09:57.360Z||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
    2022-09-10T23:09:57.365Z||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
    2022-09-10T23:09:57.370Z||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
    2022-09-10T23:09:57.377Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.389Z||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
    2022-09-10T23:09:57.396Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.406Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.413Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.473Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.500Z||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
    2022-09-10T23:09:57.533Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.578Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.586Z||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
    2022-09-10T23:09:57.601Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:09:57.841Z||main|||||WARN|500||---
    2022-09-10T23:09:57.841Z||main|||||WARN|500||Spring Data REST HAL Browser is deprecated! Prefer the HAL Explorer (artifactId: spring-data-rest-hal-explorer)!
    2022-09-10T23:09:57.841Z||main|||||WARN|500||---
    2022-09-10T23:09:58.652Z||main|||||INFO|500||Setting the server's publish address to be /api
    2022-09-10T23:09:59.487Z||main|||||DEBUG|500||Injecting class org.onap.so.security.SoBasicHttpSecurityConfigurer configuration ...
    2022-09-10T23:10:01.115Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.121Z||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
    2022-09-10T23:10:01.179Z||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
    2022-09-10T23:10:01.182Z||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
    2022-09-10T23:10:01.185Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.186Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.192Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.193Z||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
    2022-09-10T23:10:01.201Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.211Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.213Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.218Z||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
    2022-09-10T23:10:01.232Z||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
    2022-09-10T23:10:01.235Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.272Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.279Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.297Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.327Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.328Z||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
    2022-09-10T23:10:01.329Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.331Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.341Z||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
    2022-09-10T23:10:01.349Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.353Z||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
    2022-09-10T23:10:01.405Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.415Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.417Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.453Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.462Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.518Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.519Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.519Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.520Z||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
    2022-09-10T23:10:01.520Z||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
    2022-09-10T23:10:01.521Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.522Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.523Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.523Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.526Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.524Z||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
    2022-09-10T23:10:01.524Z||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
    2022-09-10T23:10:01.524Z||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
    2022-09-10T23:10:01.547Z||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
    2022-09-10T23:10:01.549Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.556Z||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
    2022-09-10T23:10:01.586Z||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
    2022-09-10T23:10:01.601Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.646Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.645Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:01.677Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:04.771Z||main|||||INFO|500||Started MsoOpenstackAdaptersApplication in 49.762 seconds (JVM running for 54.387)
    2022-09-10T23:10:09.174Z||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
    2022-09-10T23:10:09.182Z||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
    2022-09-10T23:10:09.304Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.316Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.350Z||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
    2022-09-10T23:10:09.354Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.357Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.367Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.367Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.378Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.391Z||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
    2022-09-10T23:10:09.391Z||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
    2022-09-10T23:10:09.390Z||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
    2022-09-10T23:10:09.393Z||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
    2022-09-10T23:10:09.432Z||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
    2022-09-10T23:10:09.433Z||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
    2022-09-10T23:10:09.441Z||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
    2022-09-10T23:10:09.462Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.478Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.482Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.490Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.511Z||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
    2022-09-10T23:10:09.512Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.512Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.513Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.526Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.566Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.592Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.593Z||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
    2022-09-10T23:10:09.599Z||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
    2022-09-10T23:10:09.711Z||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
    2022-09-10T23:10:09.718Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.726Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.729Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.771Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.771Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.772Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.774Z||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
    2022-09-10T23:10:09.775Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.786Z||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
    2022-09-10T23:10:09.786Z||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
    2022-09-10T23:10:09.787Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.787Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.834Z||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
    2022-09-10T23:10:09.947Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.948Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.833Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.833Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:09.834Z||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
    2022-09-10T23:10:09.816Z||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
    2022-09-10T23:10:25.240Z||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
    2022-09-10T23:10:25.255Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.355Z||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
    2022-09-10T23:10:25.363Z||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
    2022-09-10T23:10:25.384Z||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
    2022-09-10T23:10:25.418Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.418Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.423Z||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
    2022-09-10T23:10:25.429Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.432Z||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
    2022-09-10T23:10:25.433Z||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
    2022-09-10T23:10:25.437Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.441Z||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
    2022-09-10T23:10:25.450Z||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
    2022-09-10T23:10:25.460Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.473Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.486Z||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
    2022-09-10T23:10:25.532Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.538Z||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
    2022-09-10T23:10:25.548Z||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
    2022-09-10T23:10:25.552Z||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
    2022-09-10T23:10:25.553Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.579Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.580Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.584Z||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
    2022-09-10T23:10:25.588Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.612Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.619Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.626Z||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
    2022-09-10T23:10:25.639Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.763Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.765Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.804Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.805Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.829Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.831Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.834Z||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
    2022-09-10T23:10:25.839Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.843Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.849Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.861Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.861Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.881Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.897Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.996Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:25.997Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:26.000Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:26.005Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:26.008Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:26.020Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.315Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.340Z||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
    2022-09-10T23:10:57.407Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.408Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.415Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.462Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.491Z||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
    2022-09-10T23:10:57.491Z||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
    2022-09-10T23:10:57.492Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.492Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.502Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.507Z||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
    2022-09-10T23:10:57.522Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.522Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.531Z||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
    2022-09-10T23:10:57.531Z||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
    2022-09-10T23:10:57.533Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.581Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.593Z||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
    2022-09-10T23:10:57.610Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.614Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.617Z||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
    2022-09-10T23:10:57.617Z||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
    2022-09-10T23:10:57.629Z||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
    2022-09-10T23:10:57.654Z||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
    2022-09-10T23:10:57.659Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.659Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.660Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.675Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.677Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.799Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.822Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.858Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.863Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.879Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.882Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.883Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.885Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.909Z||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
    2022-09-10T23:10:57.912Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.915Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.924Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:57.929Z||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
    2022-09-10T23:10:57.947Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:58.078Z||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
    2022-09-10T23:10:58.086Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:58.107Z||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
    2022-09-10T23:10:58.346Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:58.446Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:10:58.453Z||TopicSubscriptionManager|||||ERROR|500||TASK/CLIENT-03001 Exception while fetch and lock task.
    org.camunda.bpm.client.impl.EngineClientException: TASK/CLIENT-02001 Request 'POST http://so-bpmn-infra.onap:8081/sobpmnengine/external-task/fetchAndLock HTTP/1.1' returned error: status code '503' - message: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.EngineClientLogger.exceptionWhileReceivingResponse(EngineClientLogger.java:30)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:97)
    	at org.camunda.bpm.client.impl.RequestExecutor.postRequest(RequestExecutor.java:74)
    	at org.camunda.bpm.client.impl.EngineClient.fetchAndLock(EngineClient.java:78)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.fetchAndLock(TopicSubscriptionManager.java:135)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.acquire(TopicSubscriptionManager.java:101)
    	at org.camunda.bpm.client.topic.impl.TopicSubscriptionManager.run(TopicSubscriptionManager.java:87)
    	at java.base/java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.http.client.HttpResponseException: status code: 503, reason phrase: upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
    	at org.camunda.bpm.client.impl.RequestExecutor$1.handleResponse(RequestExecutor.java:146)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:223)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
    	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:140)
    	at org.camunda.bpm.client.impl.RequestExecutor.executeRequest(RequestExecutor.java:88)
    	... 6 common frames omitted
    2022-09-10T23:19:15.629Z||http-nio-8087-exec-1|||||INFO|500||Initializing Spring DispatcherServlet 'dispatcherServlet'