Guilherme Telles [https://community.jboss.org/people/guilherme.telles] created the discussion "[JBPM 5.4] - Transaction / Concurrency problem" To view the discussion, visit: https://community.jboss.org/message/832169#832169 -------------------------------------------------------------- Hi, I'm having some trouble with concurrency, hope you guys can help me Here's the stack trace: ================================================================================================================================ 15:32:16,379 ERROR [org.drools.persistence.SingleSessionCommandService] (Thread-79) Could not commit session: java.lang.RuntimeException: Unable to commit transaction     at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:182) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]     at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:376) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]     at org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.completeWorkItem(CommandBasedStatefulKnowledgeSession.java:150) [drools-core-5.5.0.Final.jar:5.5.0.Final]     at org.jbpm.process.workitem.wsht.AsyncGenericHTWorkItemHandler$GetResultContentResponseHandler.execute(AsyncGenericHTWorkItemHandler.java:302) [jbpm-human-task-core-5.4.0.Final.jar:5.4.0.Final]     at org.jbpm.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:153) [jbpm-human-task-core-5.4.0.Final.jar:5.4.0.Final]     at org.jbpm.task.service.hornetq.HornetQTaskClientHandler.messageReceived(HornetQTaskClientHandler.java:56) [jbpm-human-task-hornetq-5.4.0.Final.jar:5.4.0.Final]     at org.jbpm.task.service.hornetq.HornetQTaskClientConnector$1.run(HornetQTaskClientConnector.java:122) [jbpm-human-task-hornetq-5.4.0.Final.jar:5.4.0.Final]     at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_21] Caused by: javax.transaction.RollbackException: ARJUNA016053: Could not commit transaction.     at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1177)     at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:117)     at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75)     at org.jboss.tm.usertx.client.ServerVMClientUserTransaction.commit(ServerVMClientUserTransaction.java:167)     at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:179) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]     ... 7 more Caused by: javax.persistence.OptimisticLockException: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.jbpm.persistence.processinstance.ProcessInstanceInfo#1]     at org.hibernate.ejb.AbstractEntityManagerImpl.wrapStaleStateException(AbstractEntityManagerImpl.java:1389) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1307) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1288) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1294) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.ejb.AbstractEntityManagerImpl$CallbackExceptionMapperImpl.mapManagedFlushFailure(AbstractEntityManagerImpl.java:1480) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.engine.transaction.synchronization.internal.SynchronizationCallbackCoordinatorImpl.beforeCompletion(SynchronizationCallbackCoordinatorImpl.java:109) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization.beforeCompletion(RegisteredSynchronization.java:53) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:76)     at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:273)     at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:93)     at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:164)     at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1165)     ... 11 more Caused by: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.jbpm.persistence.processinstance.ProcessInstanceInfo#1]     at org.hibernate.persister.entity.AbstractEntityPersister.check(AbstractEntityPersister.java:2365) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3017) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2915) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3244) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:113) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:354) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:276) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:326) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1127) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:325) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     at org.hibernate.engine.transaction.synchronization.internal.SynchronizationCallbackCoordinatorImpl.beforeCompletion(SynchronizationCallbackCoordinatorImpl.java:104) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]     ... 17 more ================================================================================================================================ I'm using JBPM 5.4, Jboss AS 7.1.1, Spring 3 The Knowledge Base it's been kept in another server. This is how I start my HornetQTaskServer: (Do I really need to start it? I've been trying to connect to the one that's supposed to come with jBPM. But, in that case, even though I can start the process, not a single task is persisted. I can only complete the process if I set the AsyncHornetQHTWorkItemHandler IP to localhost and start the HornetQ locally  ) {code}      try{             TaskService taskService = new TaskService(getEntityManagerFactoryJbpm(), SystemEventListenerFactory.getSystemEventListener());             HornetQTaskServer server = new HornetQTaskServer(taskService, "localhost", 5445);             if(!server.isRunning()) {                 Thread thread = new Thread(server);                 thread.start();             }         } catch(Exception e) {             LOGGER.warn("HornetQ Task Server já iniciado");         } {code} My Environment: {code}     public Environment getEnvironment() {         if(environment == null) {             LOGGER.info("CREATING NEW ENVIRONMENT");             environment = KnowledgeBaseFactory.newEnvironment();             environment.set(EnvironmentName.ENTITY_MANAGER_FACTORY, getEntityManagerFactoryJbpm());         }         return environment;     } {code} How I register my handlers: {code} public static void registerHandlers(StatefulKnowledgeSession kSession) {         LOGGER.info("REGISTERING HANDLERS...");         final EmailHandler emailHandler = new EmailHandler();         final OrcamentoHandler orcamentoHandler = new OrcamentoHandler();         final MudarStatusHandler mudarStatusHandler = new MudarStatusHandler();         kSession.getWorkItemManager().registerWorkItemHandler("notificacao_lider", emailHandler);         kSession.getWorkItemManager().registerWorkItemHandler("notificacao_negocio", emailHandler);         kSession.getWorkItemManager().registerWorkItemHandler("notificacao_responsavel", emailHandler);         kSession.getWorkItemManager().registerWorkItemHandler("modulo_orcamento", orcamentoHandler);         kSession.getWorkItemManager().registerWorkItemHandler("muda_status", mudarStatusHandler);         TaskClient client = new TaskClient(new HornetQTaskClientConnector(UUID.randomUUID().toString(), new HornetQTaskClientHandler(SystemEventListenerFactory.getSystemEventListener())));         TaskManager taskManager = new TaskManager();         AsyncHornetQHTWorkItemHandler htHandler = new AsyncHornetQHTWorkItemHandler(taskClient, kSession, true);         htHandler.setPort(5445);         htHandler.connect();         kSession.getWorkItemManager().registerWorkItemHandler("Human Task", htHandler);   } {code} Anyone have any insight? I already searched the whole community, but nothing helped. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/832169#832169] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]