0 Replies Latest reply on Feb 7, 2017 7:32 AM by ameenulla hussaini

    Jbpm 3.2.6 Class cast Exception Once this Exception comes flow breaks

    ameenulla hussaini Newbie

      sometimes I am getting following exception on submitting task, this exception occurs rarely and it is happening only in production environment not able to reproduce in local.

       

       

      java.lang.ClassCastException: org.jbpm.graph.def.Node cannot be cast to org.jbpm.graph.node.TaskNode
        at org.jbpm.graph.node.TaskNode$$FastClassByCGLIB$$923668a4.invoke(<generated>)
        at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
        at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:161)
        at org.jbpm.graph.node.TaskNode$$EnhancerByCGLIB$$53e0141a.completionTriggersSignal(<generated>)
        at org.jbpm.taskmgmt.exe.TaskInstance.end(TaskInstance.java:432)
        at org.jbpm.taskmgmt.exe.TaskInstance.end(TaskInstance.java:391)
        at com.liferay.jbpm.WorkflowServiceUtil.completeTask(MonorailWorkflowServiceUtil.java:308)
        at com.liferay.jbpm.WorkflowServiceUtil.process(MonorailWorkflowServiceUtil.java:72)
        at com.liferay.jbpm.servlet.JBPMServlet.service(JBPMServlet.java:67)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
      

       

       

      Fallowing is my code

      private String completeTask(long processInstanceId, String taskName, String transition, long userId, long orgId,
        Map<String, Object> processVariables, long taskInstanceId, String driver, String url, String userName, String password) {
        JbpmContext jbpmContext = null;
        String status = "SUCCESS";
        long taskId = 0;
        Connection con = null;
        try {
        con = DBConnection.getDBConnetion(driver, url, userName, password);
        JbpmConfiguration jbpmConfiguration = JbpmConfiguration.getInstance();
        jbpmContext = jbpmConfiguration.createJbpmContext();
        con.setAutoCommit(false);
        jbpmContext.setConnection(con);
        ProcessInstance processInstance = jbpmContext.getProcessInstance(processInstanceId);
        TaskMgmtInstance taskMgmtInstance = processInstance.getTaskMgmtInstance();
        Collection<TaskInstance> taskInstances = taskMgmtInstance.getTaskInstances();
        for (TaskInstance taskInstance : taskInstances) {
        String strTaskName = taskInstance.getTask().getName();
        taskId = taskInstance.getId();
        // log.info("Complete Task - TaskName:" + strTaskName +
        // ", Task to complete: " +
        // taskName);
        if (taskInstanceId > 0 && taskInstanceId == taskId) {
        log.info("Complete Task - Task to complete:" + strTaskName);
      
      
        if (null != processVariables && processVariables.size() > 0) {
        try {
        processVariables.remove("");
        processVariables.remove(null);
        } catch (Exception e) {
        e.printStackTrace();
        }
        taskInstance.addVariables(processVariables);
        }
        log.info("Complete Task - transition:" + transition);
        if (null != transition && transition.length() > 0) {
        taskInstance.end(transition);
        } else {
        taskInstance.end();
        }
        jbpmContext.save(taskInstance);
        break;
        }
        }
        con.commit();
        } catch (Exception e) {
        try {
        con.rollback();
        } catch (SQLException e1) {
        e.printStackTrace();
        }
        status = "FAILED";
        e.printStackTrace();
        } finally {
      
      
        jbpmContext.close();
        DBConnection.closeConnection(con);
        }
        }