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I am trying to get persistence setup and I am get the following exception:

java.lang.IllegalStateException: A JTA EntityManager cannot use getTransaction()

        at org.hibernate.ejb.AbstractEntityManagerImpl.getTransaction(AbstractEntityManagerImpl.java:324)

        at org.jbpm.task.service.TaskServiceSession.doOperationInTransaction(TaskServiceSession.java:811)

        at org.jbpm.task.service.TaskServiceSession.persistInTransaction(TaskServiceSession.java:786)

        at org.jbpm.task.service.TaskServiceSession.addUser(TaskServiceSession.java:69)

I saw the a relevant thread on this forum: http://community.jboss.org/thread/162939?start=15&tstart=0

According to the advice on this list, I should setup two different persistence units, a separate one for tasks. That works  but I end up persisting just the process info and not the task info. This means I am unable to get tasks for a user who logs in at a later time. I am sure this is not expected behavior. My current code is:

        EntityManagerFactory emf = Persistence.createEntityManagerFactory( "org.jbpm.persistence.jpa", HibernateConfig.getPersistenceProps() );

        EntityManagerFactory emfTask = Persistence.createEntityManagerFactory( "org.jbpm.myTask", HibernateConfig.getPersistenceProps() );

        Environment env = KnowledgeBaseFactory.newEnvironment();

        env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );

        env.set( EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager() );

        env.set( EnvironmentName.TRANSACTION, TransactionManagerServices.getTransactionManager() );

        env.set( EnvironmentName.GLOBALS, new MapGlobalResolver() );

        Properties properties = new Properties();

        properties.put("drools.processInstanceManagerFactory", "org.jbpm.persistence.processinstance.JPAProcessInstanceManagerFactory");

        properties.put("drools.processSignalManagerFactory", "org.jbpm.persistence.processinstance.JPASignalManagerFactory");

        KnowledgeSessionConfiguration config = KnowledgeBaseFactory.newKnowledgeSessionConfiguration(properties);

/* Start Mina server for HT*/

        MinaTaskServer server = new MinaTaskServer(taskService);

        Thread thread = new Thread(server);

        thread.start();

        TaskServiceSession taskSession = taskService.createSession();

        CurrentHibernate.setTaskServiceSession(taskSession);

        List<User> users = getSimbaService().getUserService().getAllUsers();

        for(User user: users) {

          taskSession.addUser(new org.jbpm.task.User(user.getUsername()));

        }

        //Build Knowlede Base

        KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();

        kbuilder.add(ResourceFactory.newClassPathResource("META-INF/PermissionRequest.bpmn"), ResourceType.BPMN2);

        KnowledgeBase kbase = kbuilder.newKnowledgeBase();

        StatefulKnowledgeSession ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, config, env);

ksession.getWorkItemManager().registerWorkItemHandler("Human Task", new CommandBasedWSHumanTaskHandler(ksession));

        ksession.getWorkItemManager().registerWorkItemHandler("sendPermissionRequest", new PermissionRequestTaskHandler());

        Map<String, Object> params = new HashMap<String, Object>();

        params.put("description", taskDetails.toString());

        params.put("requesterComments", requesterComments);

        params.put("approver", toUser);

        params.put("permissionRequestItems", taskDetails.toString());

     ProcessInstance processInstance = ksession.startProcess("permissionRequest", params);

Thanks for your help.