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JBPM5.4 Web Application Human Task server Integration
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created by <a href="https://community.jboss.org/people/arun_kumar">Arunkumar Palanivel</a> in <i>jBPM Development</i> - <a href="https://community.jboss.org/message/802895#802895">View the full discussion</a>
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<div class="jive-rendered-content"><p>I am new to JBPM. When I try to integrate simple jbpm5.4 web application with human task (seperate instance). I am getting below exception. I haven't get any exception on server startup.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Help me on this.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>14:49:13,112 ERROR [org.drools.persistence.SingleSessionCommandService] (http--127.0.0.1-8080-1) Could not commit session: org.jbpm.workflow.instance.WorkflowRuntimeException: [com.sample.bpmn.sampleHTformvariables:444 - Sample Order  Task:3] -- null<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:132) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:279) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:238) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.node.JoinInstance.triggerCompleted(JoinInstance.java:152) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.node.JoinInstance.internalTrigger(JoinInstance.java:52) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:279) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:238) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.node.ActionNodeInstance.triggerCompleted(ActionNodeInstance.java:55) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:51) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:279) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:238) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:49) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:41) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:35) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:194) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:309) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.process.instance.ProcessRuntimeImpl.startProcessInstance(ProcessRuntimeImpl.java:170) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:140) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1098) [drools-core-5.5.0.Final.jar:5.5.0.Final]<br/>        at org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:320) [drools-core-5.5.0.Final.jar:5.5.0.Final]<br/>        at org.drools.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:120) [drools-core-5.5.0.Final.jar:5.5.0.Final]<br/>        at org.drools.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:39) [drools-core-5.5.0.Final.jar:5.5.0.Final]<br/>        at org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36) [drools-core-5.5.0.Final.jar:5.5.0.Final]<br/>        at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:373) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]<br/>        at org.drools.command.impl.CommandBasedStatefulKnowledgeSession.startProcess(CommandBasedStatefulKnowledgeSession.java:223) [drools-core-5.5.0.Final.jar:5.5.0.Final]<br/>        at com.sample.processserver.TaskProcessServlet.processRequest(TaskProcessServlet.java:102) [classes:]<br/>        at com.sample.processserver.TaskProcessServlet.doGet(TaskProcessServlet.java:198) [classes:]<br/>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]<br/>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]<br/>        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.13.Final.jar:]<br/>        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]<br/>        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:]<br/>        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:]<br/>        at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.1.Final.jar:7.1.1.Final]<br/>        at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]<br/>        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:]<br/>        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:]<br/>        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:]<br/>        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:]<br/>        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.13.Final.jar:]<br/>        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.13.Final.jar:]<br/>        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:]<br/>        at java.lang.Thread.run(Thread.java:619) [rt.jar:1.6.0_16]<br/><strong>Caused by: java.lang.NullPointerException</strong><br/>        at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler.registerTaskEvents(GenericHTWorkItemHandler.java:137) [jbpm-human-task-core-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.process.workitem.wsht.LocalHTWorkItemHandler.connect(LocalHTWorkItemHandler.java:64) [jbpm-human-task-core-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler.executeWorkItem(GenericHTWorkItemHandler.java:180) [jbpm-human-task-core-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.internalExecuteWorkItem(JPAWorkItemManager.java:55) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]<br/>        at org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:107) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]<br/>        ... 45 more</p><p>14:49:13,268 ERROR [org.jboss.as.txn] (http--127.0.0.1-8080-1) JBAS010152: APPLICATION ERROR: transaction still active in request with status 1</p></div>
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