Hi, In Jbpm 3.2.x, I never had this problem. But I recently upgraded to Jbpm 3.3.1, and now, on a State Node, if I have a timer set which repeats, and on the timers action I call executionContext.leaveNode(), I get an exception. If my timer is not set to repeat, I don't get the exception. This is a bit of a showstopper for me. Any ideas would be appreciated? Here is my simple process definition: <process-definition | xmlns="urn:jbpm.org:jpdl-3.2" name="ITD Sick Leave"> | <swimlane name="Initiator"></swimlane> | <start-state name="Record Sick Leave"> | <transition to="Wait for Tomorrow"></transition> | </start-state> | | | <state name="Wait for Tomorrow"> | <timer duedate="5 seconds" name="Wait for Tomorrow" repeat="5 seconds"> | <action class="za.co.workflow.itdsickleave.action.WaitForTomorrow"></action> | </timer> | <transition to="Complete"></transition> | </state> | | | <end-state name="Complete"></end-state> | </process-definition> Here is my action's execute method attached to the timer: public void handle(ExecutionContext executionContext) throws Exception { | executionContext.leaveNode(); | } Here is the exception being thrown: INFO JbpmJobExecutor:10.11.5.61:1 org.jbpm.persistence.db.DbPersistenceService - problem committing transaction: optimistic locking failed | INFO JbpmJobExecutor:10.11.5.61:1 org.jbpm.svc.Services - problem closing service 'persistence': optimistic locking failed | ERROR JbpmJobExecutor:10.11.5.61:1 org.hibernate.event.def.AbstractFlushingEventListener - Could not synchronize database state with session | org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.jbpm.job.Timer#2480] | 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:266) | at org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:222) | at org.jbpm.svc.Services.close(Services.java:294) | at org.jbpm.JbpmContext.close(JbpmContext.java:136) | at org.jbpm.job.executor.JobExecutorThread.executeJob(JobExecutorThread.java:190) | at org.jbpm.job.executor.JobExecutorThread.run(JobExecutorThread.java:60) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4208614#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...