[jboss-dev-forums] [jBPM Development] - Re: jbpm 5.4.0 - NullPointerException completing workItem. is this bug not resolved yet ?

Feki Ahmed [https://community.jboss.org/people/bardelman] created the discussion "Re: jbpm 5.4.0 - NullPointerException completing workItem. is this bug not resolved yet ?" To view the discussion, visit: https://community.jboss.org/message/801076#801076 -------------------------------------------------------------- You are pointing to the right place ! i resolved this problem and i remember that i had to instanciate a new kbuilder, a new  kbase ,a new  env , a new  emf for the session to reload as it is a new created session and even a new client for dealing with tasks. here is the code : KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();         kbuilder.add(new ClassPathResource(proctoreloadname+".bpmn"), ResourceType.BPMN2);         if (kbuilder.hasErrors()) {             for (KnowledgeBuilderError error : kbuilder.getErrors()) {                 System.out.println(">>> Error:" + error.getMessage());             }             System.out.println(">>> Knowledge couldn't be parsed! ");         }         kbase = KnowledgeBaseFactory.newKnowledgeBase();         kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());         env = EnvironmentFactory.newEnvironment();         emf = Persistence.createEntityManagerFactory("org.jbpm.runtime.ht");         env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);         env.set(EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager());         processInstance = null;                // Let's reload the session                   ksessions.add(JPAKnowledgeService.loadStatefulKnowledgeSession(Integer.parseInt(idSessionToReload), kbase, null, env));                   ksessions.remove(ksessions.size()-2);                   sessionId= ksessions.get(ksessions.size()-1).getId();                   // All the listeners and WorkItemHandlers are volatile, so we need to register them each time that we reload the session                   //  from the DB.                   clients.add(createTaskService(emf));                   clients.remove(clients.size()-2);                   clients.get(clients.size()-1).connect();                   localHTWorkItemHandlers.add(new LocalHTWorkItemHandler(clients.get(clients.size()-1), ksessions.get(ksessions.size()-1)));                   localHTWorkItemHandlers.remove(localHTWorkItemHandlers.size()-2);                   try {                                         clients.get(clients.size()-1).disconnect();                               } catch (Exception e1) {                                         // TODO Auto-generated catch block                                         e1.printStackTrace();                               }                   ksessions.get(ksessions.size()-1).getWorkItemManager().registerWorkItemHandler("Human Task", localHTWorkItemHandlers.get(localHTWorkItemHandlers.size()-1)); -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/801076#801076] Start a new discussion in jBPM Development at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]