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I'm using jbpm5.3, with spring and hibernate.

In the method I use to start a process instance, if I use the kSession.dispose() it will give me the error below, but if not, it will work well! (The application was just started, so no kSessions used before, and the database was clean)

It is not supposed to call dispose() when kSession will not be used anymore (I have one kSession per process instance).

When I call kSession.dispose() for the first time, I got the error:

java.lang.IllegalStateException: Illegal method call. This session was previously disposed.
          at org.drools.reteoo.DisposedReteooWorkingMemory.getProcessRuntime(DisposedReteooWorkingMemory.java:270)
          at org.drools.impl.StatefulKnowledgeSessionImpl.getProcessRuntime(StatefulKnowledgeSessionImpl.java:874)
          at org.drools.persistence.SingleSessionCommandService$SynchronizationImpl.afterCompletion(SingleSessionCommandService.java:448)
          at org.drools.persistence.jta.JtaTransactionSynchronizationAdapter.afterCompletion(JtaTransactionSynchronizationAdapter.java:25)
          at bitronix.tm.BitronixTransaction.fireAfterCompletionEvent(BitronixTransaction.java:497)
          at bitronix.tm.BitronixTransaction.rollback(BitronixTransaction.java:283)
          at bitronix.tm.BitronixTransactionManager.rollback(BitronixTransactionManager.java:129)
          at org.springframework.transaction.jta.JtaTransactionManager.doRollback(JtaTransactionManager.java:1037)
(......)

How I start the process instance:

public void startProcess(CoreData coreData, String definitionId) {
 
 //Creating variables ...
(...)
     //taskService is a spring bean
     LocalTaskService localTaskService = new LocalTaskService(taskService);
 
//GetKSession with null will create a new kSession
     StatefulKnowledgeSession kSession = getKSession(null, localTaskService);
     JPAWorkingMemoryDbLogger jbpmLogger = new JPAWorkingMemoryDbLogger(kSession);
 
     ProcessInstance processInstance = kSession.startProcess(definitionId, variables);
     
     jbpmLogger.dispose();
//If I remove this kSession.dispose() it will work well, but will give a optimistic lock error later....
     kSession.dispose();
}

How I create the kSession:

public StatefulKnowledgeSession getKSession(Integer kSessionId, LocalTaskService localTaskService) {
  
     StatefulKnowledgeSession kSession;
  
     Environment env = KnowledgeBaseFactory.newEnvironment();
     env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, entityManagerWorkflow.getEntityManagerFactory());
     env.set(EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager());
 
     if (kSessionId == null) {
          kSession = JPAKnowledgeService.newStatefulKnowledgeSession(knowledgeBaseProvider.getKbase(), null, env);
     } else {
          kSession = JPAKnowledgeService.loadStatefulKnowledgeSession(kSessionId, knowledgeBaseProvider.getKbase(), null, env);
     }
/*
* Adding Listner
* */
     CustomProcessEventListener customProcessEventListener = new CustomProcessEventListener();
     kSession.addEventListener(customProcessEventListener);
 
/*
* Register WorkItemHandler
* */
     GenericHTWorkItemHandler handler = new GenericHTWorkItemHandler(kSession);
     handler.setClient(localTaskService);
     handler.setLocal(true);
     handler.setIpAddress("127.0.0.1");
     handler.setPort(9123);
     handler.connect();
     kSession.getWorkItemManager().registerWorkItemHandler("Human Task", handler);
 
     return kSession;
}
 

Thanks