23:34:40.450 [camundaTaskExecutor-1] WARN  org.camunda.bpm.engine.jobexecutor - ENGINE-14006 Exception while executing job xxxxxxxxxxxx:
org.camunda.bpm.engine.OptimisticLockingException: ENGINE-03005 Execution of 'DELETE MessageEntity[xxxxxxxxxxxx]' failed. Entity was updated by another transaction concurrently.
        at org.camunda.bpm.engine.impl.db.EnginePersistenceLogger.concurrentUpdateDbEntityException(EnginePersistenceLogger.java:135)
        at org.camunda.bpm.engine.impl.db.entitymanager.DbEntityManager.handleOptimisticLockingException(DbEntityManager.java:499)
        at org.camunda.bpm.engine.impl.db.entitymanager.DbEntityManager.checkFlushResults(DbEntityManager.java:451)
        at org.camunda.bpm.engine.impl.db.entitymanager.DbEntityManager.flushDbOperations(DbEntityManager.java:367)
        at org.camunda.bpm.engine.impl.db.entitymanager.DbEntityManager.flushDbOperationManager(DbEntityManager.java:325)
        at org.camunda.bpm.engine.impl.db.entitymanager.DbEntityManager.flush(DbEntityManager.java:297)
        at org.camunda.bpm.engine.impl.interceptor.CommandContext.flushSessions(CommandContext.java:208)
        at org.camunda.bpm.engine.impl.interceptor.CommandContext.close(CommandContext.java:137)
        at org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:116)
        at org.camunda.bpm.engine.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:46)
        at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140)
        at org.camunda.bpm.engine.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:44)
        at org.camunda.bpm.engine.impl.interceptor.ProcessApplicationContextInterceptor.execute(ProcessApplicationContextInterceptor.java:70)
        at org.camunda.bpm.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
        at org.camunda.bpm.engine.impl.jobexecutor.ExecuteJobHelper.executeJob(ExecuteJobHelper.java:51)
        at org.camunda.bpm.engine.impl.jobexecutor.ExecuteJobHelper.executeJob(ExecuteJobHelper.java:44)
        at org.camunda.bpm.engine.impl.jobexecutor.ExecuteJobsRunnable.executeJob(ExecuteJobsRunnable.java:92)
        at org.camunda.bpm.engine.impl.jobexecutor.ExecuteJobsRunnable.run(ExecuteJobsRunnable.java:61)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)