[jboss-user] [JBoss jBPM] - Lazy Initaslization Error

[saurabh.khattar]

I have made a small BPM web application. In one of the methods in servlet I am getting the instances for a particular user:

private void getProcessDetails(HttpServletRequest request, HttpServletResponse response) {
  |         
  |         HttpSession session = request.getSession();    
  |         
  |         List jbpmTaskInstances = new ArrayList();
  |         
  |         JbpmConfiguration jbpmConfiguration = JbpmEncompassConfiguration.instance().getJbpmConfiguration();
  |         JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
  |         
  | 
  |         Session jbpmContextSession = jbpmContext.getSession();
  |         
  | 
  |         String actorPmId = new String("PM");
  |         String actorCordId = new String("Coordinator");
  |         
  |         List actorsList = new ArrayList();
  |         actorsList.add(actorPmId);
  |         List pooledPmTaskInstances = jbpmContext.getTaskMgmtSession().findTaskInstances(actorsList);
  |         List jbpmPmTaskInstanceList = jbpmContextSession.createQuery("from org.jbpm.taskmgmt.exe.TaskInstance ti where ti.start is null and ti.end is null and actorId = '"+actorPmId+"'").list();
  |         //add pooledTaskInstances to taskList
  |         jbpmPmTaskInstanceList.addAll(pooledPmTaskInstances);
  |         jbpmTaskInstances.addAll(jbpmPmTaskInstanceList);       
  |        
  |         actorsList = new ArrayList();
  |         actorsList.add(actorCordId);
  |         List pooledCordTaskInstances = jbpmContext.getTaskMgmtSession().findTaskInstances(actorsList);
  |         List jbpmCordTaskInstanceList = jbpmContextSession.createQuery("from org.jbpm.taskmgmt.exe.TaskInstance ti where ti.start is null and ti.end is null and actorId = '"+actorCordId+"'").list();
  |        //add pooledTaskInstances to taskList
  |         jbpmCordTaskInstanceList.addAll(pooledCordTaskInstances);        
  |         jbpmTaskInstances.addAll(jbpmCordTaskInstanceList);
  |         
  |         Iterator iAll = jbpmTaskInstances.iterator();
  |         Iterator iPm = jbpmPmTaskInstanceList.iterator();
  |         Iterator iCord = jbpmCordTaskInstanceList.iterator();
  |         
  |         List jbpmProcessInstances = new ArrayList();
  |         
  |         while(iAll.hasNext()){
  |             TaskInstance ti = (TaskInstance) iAll.next();
  |             ProcessInstance processInstance = ti.getProcessInstance();
  |             jbpmProcessInstances.add(processInstance);
  |         }        
  |         
  |         
  |         
  |         session.setAttribute("pmTaskList", jbpmPmTaskInstanceList);
  |         session.setAttribute("cordTaskList", jbpmCordTaskInstanceList);
  |         session.setAttribute("allTaskList", jbpmProcessInstances);
  |         
  |         
  |         
  |         //jbpmContextSession.close();      
  |         jbpmContext.close();
  |         
  |     }
  |     
  | 


I set arraylist of process instances in the session. But when I try to access process instances in jsp it gives the following error:



  | 
  | 10:13:39,214 ERROR [LazyInitializationException] could not initialize proxy - the owning Session was closed
  | org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed
  | 	at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:60)
  | 	at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:111)
  | 	at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:172)
  | 	at org.jbpm.graph.exe.ProcessInstance$$EnhancerByCGLIB$$614637f6.getContextInstance(<generated>)
  | 	at org.apache.jsp.jsp.index_jsp._jspService(index_jsp.java:121)
  | 	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
  | 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  | 	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
  | 	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  | 	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  | 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  | 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  | 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  | 	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  | 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  | 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  | 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  | 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
  | 	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
  | 	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
  | 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  | 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
  | 	at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
  | 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
  | 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
  | 	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
  | 	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
  | 	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
  | 	at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
  | 	at java.lang.Thread.run(Thread.java:595)

Please some one help me....

View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4169056#4169056

Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4169056