Event Listener is not calling from BPM ?

dharmraj — Sat, 30 Nov 2019 07:56:28 GMT

In Process I am using Intermediate Timer Cach event and Intermediate Message Catching Event. When I start Process this error is coming continuously

Error Description

ProcessInstance[567501] was updated by another transaction concurrently

com.activiti.service.reporting.eventprocessor.AbstractActivitiEventProcessor

07:35:11 [pool-2-thread-2] WARN com.activiti.service.reporting.eventprocessor.AbstractActivitiEventProcessor - Exception during processing of event with log number 366253 and data {"timeStamp":
1575097497725,"processDefinitionId":"NewProcess:4:362561","processInstanceId":"423225","executionId":"423225","variableType":"string","stringValue":"Data1,Data2","name":"status","tenantId":"tenant_1","value":"Data1,Data2","userId":"28028","processDefinitionKey":"NewProcess"}
java.lang.NullPointerException: null

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Event Listener is not calling from BPM ?