[jboss-user] [JBoss jBPM] - Cancel a process in a repeated action

[vbub]

i'm starting the execution of an action 5 seconds after entering a task node. this action repeatedly checks a state in a third party application and eventually shall cancel the whole process instance. 

i'm trying to do this by using this code:

CancelProcessInstanceCommand cpic = new CancelProcessInstanceCommand(task.getProcessInstance().getId());
  | cpic.setCancelSubProcesses(true);
  | CommandServiceImpl csi = new CommandServiceImpl(jbpmConfiguration);
  | csi.execute(cpic);

i get the following error (running with postgreSQL on apache tomcat):

12:38:46,520 ERROR [168.0.18:1] JobExecutorThread : exception in job executor thread. waiting 2500 milliseconds
  | org.jbpm.JbpmException: problem closing services {persistence=org.jbpm.persistence.JbpmPersistenceException: hibernate commit failed}
  | 	at org.jbpm.svc.Services.close(Services.java:235)
  | 	at org.jbpm.JbpmContext.close(JbpmContext.java:139)
  | 	at org.jbpm.job.executor.JobExecutorThread.executeJob(JobExecutorThread.java:181)
  | 	at org.jbpm.job.executor.JobExecutorThread.run(JobExecutorThread.java:62)
  | Caused by: org.jbpm.persistence.JbpmPersistenceException: hibernate commit failed
  | 	at org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:216)
  | 	at org.jbpm.svc.Services.close(Services.java:222)
  | 	... 3 more
  | Caused by: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.jbpm.job.Timer#683]
  | 	at org.hibernate.persister.entity.AbstractEntityPersister.check(AbstractEntityPersister.java:1765)
  | 	at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2407)
  | 	at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2307)
  | 	at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2607)
  | 	at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:92)
  | 	at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
  | 	at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:234)
  | 	at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:142)
  | 	at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
  | 	at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
  | 	at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
  | 	at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
  | 	at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
  | 	at org.jbpm.persistence.db.DbPersistenceService.commit(DbPersistenceService.java:253)
  | 	at org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:211)
  | 	... 4 more
  | 
  | i've read about the concept of executing the commands asynchronously but it seems the CommandServiceImpl executes the CancelProcessInstanceCommand immediately (when my action, called out of the JobExecutor/Timer is still active)... i'm not sure how to solve this and haven't found a thread or solution in this forum yet that seem to fit my problem.
  | 
  | thank you very much,
  | volker

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