Linh Pham [https://community.jboss.org/people/lpham1] created the discussion "StaleObjectStateException on jBPM 5.1 running on JBoss 6.1" To view the discussion, visit: https://community.jboss.org/message/724897#724897 -------------------------------------------------------------- Hi All, I got an intermittent StaleObjectStateException while completing a Human Task in jBPM. My current set up is as follows: - Message Driven Bean processes a message, and invokes jBPM to complete a human task:     @TransactionAttribute(value = TransactionAttributeType.REQUIRES_NEW)     public void onMessage(Message message)     {         try         {                // pulling out the sessionId, workItemId, and resultsMap  from the message             final StatefulKnowledgeSession ksession = ((JbpmLauncher) new InitialContext().lookup("java:module/JbpmLauncher")).getSession(sessionId);             ksession.getWorkItemManager().completeWorkItem(inbound.getWorkItemId(), inbound.getResultsMap());         }         catch(NamingException e)         {             LOGGER.error("Encounterred exception", e);             throw new WorkflowException("Unable to find the JBPM Launcher. ", e);    //WorkflowException is RuntimeException with @ApplicationException annotation.         }         catch(Exception e)         {             LOGGER.error("Encounterred exception", e);             throw new WorkflowException(e);   //WorkflowException is RuntimeException with @ApplicationException annotation.         }     } Intermittently, I got StaleObjectStateException and the stack trace is here: http://pastebin.com/HxUfSPh5 http://pastebin.com/HxUfSPh5 I am using jBPM 5.1, JBoss 6.1, the jbpm-ds.xml is XA datasource with transaction isolation of TRANSACTION_READ_COMMITTED.  JMS implementation is ActiveMQ with XA Datasource. My environment is very low traffic, with just one user doing testing at the moment. Is there a way to reliably reproduce the problem? And more importantly how can I get around this StaleObjectStateException? Thanks for your help. Linh -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/724897#724897] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]