This looks to be related to SO-2797 (the same error) but happening on different object.

This is happening sporadically and it seems to fixed itself after a restart of bpmn-infra pod.

2020-09-25 15:10:23,392|trace-#||camundaTaskExecutor-1||ExecuteBuildingBlock|Test UUID as JBoss not found|DEBUG|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| ============================response begin==========================================
2020-09-25 15:10:23,392|trace-#||camundaTaskExecutor-1||ExecuteBuildingBlock|Test UUID as JBoss not found|DEBUG|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| Status code : 200 OK
2020-09-25 15:10:23,393|trace-#||camundaTaskExecutor-1||ExecuteBuildingBlock|Test UUID as JBoss not found|DEBUG|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| Status text :
2020-09-25 15:10:23,393|trace-#||camundaTaskExecutor-1||ExecuteBuildingBlock|Test UUID as JBoss not found|DEBUG|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| Headers : [X-Content-Type-Options:"nosniff", X-XSS-Protection:"1; mode=block", Cache-Control:"no-cache, no-store, max-age=0, must-revalidate", Pragma:"no-cache", Expires:"0", X-Frame-Options:"DENY", Content-Type:"application/hal+json;charset=UTF-8", Transfer-Encoding:"chunked", Date:"Fri, 25 Sep 2020 15:10:22 GMT"]
2020-09-25 15:10:23,396|trace-#||camundaTaskExecutor-1||ExecuteBuildingBlock|Test UUID as JBoss not found|DEBUG|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| Response body: {
{{ "id" : 623,}}
{{ "buildingBlockName" : "ConfigAssignVnfBB",}}
{{ "resourceType" : "NO_VALIDATE",}}
{{ "targetAction" : "CUSTOM",}}
{{ "_links" : {}}
{{ "self" : {}}
{{ "href" : "http://so-catalog-db-adapter.frank:8082/buildingBlockDetail/623"}}
{{ },}}
{{ "buildingBlockDetail" : {}}
{{ "href" : "http://so-catalog-db-adapter.frank:8082/buildingBlockDetail/623"}}
{{ }}}
{{ }}}
}
2020-09-25 15:10:23,396|trace-#||camundaTaskExecutor-1||ExecuteBuildingBlock|Test UUID as JBoss not found|DEBUG|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| =======================response end=================================================
2020-09-25 15:10:23,397|trace-#||camundaTaskExecutor-1||ExecuteBuildingBlock|Test UUID as JBoss not found|INFO|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| InvokeReturn
2020-09-25 15:10:23,429|trace-#||camundaTaskExecutor-1||ConfigAssignVnfBB|Test UUID as JBoss not found|INFO|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| Start preProcessAbstractCDSProcessing
2020-09-25 15:10:23,436|trace-#||camundaTaskExecutor-1||ConfigAssignVnfBB|Test UUID as JBoss not found|DEBUG|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| BlueprintName : UbuntuVNF BlueprintVersion : 1.0.0
2020-09-25 15:10:23,511|trace-#||camundaTaskExecutor-1||WorkflowActionBB|Test UUID as JBoss not found|ERROR|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| Runtime error : Error while evaluating expression: ${AbstractCDSProcessingBBUtils.constructExecutionServiceInputObject(InjectExecution.execute(execution, execution.getVariable("gBuildingBlockExecution")))}. Cause: Cannot coerce from class org.onap.so.bpmn.common.DelegateExecutionImpl to interface org.camunda.bpm.engine.delegate.DelegateExecution
2020-09-25 15:10:23,512|trace-#||camundaTaskExecutor-1||WorkflowActionBB|Test UUID as JBoss not found|INFO|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| Building a WorkflowException for Subflow
2020-09-25 15:10:23,513|trace-#||camundaTaskExecutor-1||WorkflowActionBB|Test UUID as JBoss not found|INFO|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| Outgoing WorkflowException is WorkflowException[processKey=WorkflowActionBB,errorCode=7000,errorMessage=Runtime error : Error while evaluating expression: ${AbstractCDSProcessingBBUtils.constructExecutionServiceInputObject(InjectExecution.execute(execution, execution.getVariable("gBuildingBlockExecution")))}. Cause: Cannot coerce from class org.onap.so.bpmn.common.DelegateExecutionImpl to interface org.camunda.bpm.engine.delegate.DelegateExecution,workStep=*,extSystemErrorSource=null]
2020-09-25 15:10:23,513|trace-#||camundaTaskExecutor-1||WorkflowActionBB|Test UUID as JBoss not found|INFO|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| Throwing MSOWorkflowException
2020-09-25 15:10:23,515|trace-#||camundaTaskExecutor-1||WorkflowActionBB|Test UUID as JBoss not found|DEBUG|0|10.42.8.92|frank-so-bpmn-infra-5b55cdb5c-cjfds|||| [WORKFLOW-CONTEXT-HOLDER] Adding context to the queue: b55e6074-40c1-4087-93f6-50deb06a4744