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jbpm 5.4.0 - NullPointerException completing workItem. is this bug not resolved yet ?
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created by <a href="https://community.jboss.org/people/bardelman">Feki Ahmed</a> in <i>jBPM Development</i> - <a href="https://community.jboss.org/message/799849#799849">View the full discussion</a>
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<div class="jive-rendered-content"><p>i think that i have the same issue then in <a class="jive-link-message-small" href="https://community.jboss.org/message/790056#790056">here</a> which seems to be a bug in jbpm 5.4.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>i had the same exception when trying to complete a workitem after a session reload,</p><p>By the way, i coudn't get a processInstance using  :processInstance = ksession.getProcessInstance(processInstance.getId()); from the reloaded Session, i also wish to know why.</p><p>even the ksession.getProcessInstances() is empty !)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>i have to mention that the task status is "completed" in the database even when this exception happens but the process do not continue to the next task.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>this is the log for it the exception: </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>(SingleSessionCommandService.java:400) <span style="color: #ff0000;">ERROR org.drools.persistence.SingleSessionCommandService - Could not commit session</span></p><p><span style="color: #ff0000;">java.lang.NullPointerException</span></p><p>          at org.jbpm.process.instance.impl.ProcessInstanceImpl.setProcess(ProcessInstanceImpl.java:62)</p><p>          at org.jbpm.marshalling.impl.AbstractProtobufProcessInstanceMarshaller.readProcessInstance(AbstractProtobufProcessInstanceMarshaller.java:375)</p><p>          at org.jbpm.persistence.processinstance.ProcessInstanceInfo.getProcessInstance(ProcessInstanceInfo.java:142)</p><p>          at org.jbpm.persistence.processinstance.JPAProcessInstanceManager.getProcessInstance(JPAProcessInstanceManager.java:91)</p><p>          at org.jbpm.process.instance.ProcessRuntimeImpl.getProcessInstance(ProcessRuntimeImpl.java:206)</p><p>          at org.drools.common.AbstractWorkingMemory.getProcessInstance(AbstractWorkingMemory.java:1116)</p><p>          at org.drools.impl.StatefulKnowledgeSessionImpl.getProcessInstance(StatefulKnowledgeSessionImpl.java:297)</p><p>          at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:117)</p><p>          at org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:69)</p><p>          at org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:32)</p><p>          at org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36)</p><p>          at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:373)</p><p>          at org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.<span style="color: #ff0000;">completeWorkItem</span>(CommandBasedStatefulKnowledgeSession.java:150)</p><p>          at ManagedBeans.JbpmAPIUtil.StartAndCompleteTask(JbpmAPIUtil.java:372)</p><p>          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)</p><p>          at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)</p><p>          at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)</p><p>          at java.lang.reflect.Method.invoke(Unknown Source)</p><p>          at org.apache.el.parser.AstValue.invoke(AstValue.java:264)</p><p>          at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278)</p><p>          at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)</p><p>          at com.sun.faces.facelets.tag.jsf.core.AjaxBehaviorListenerImpl.processAjaxBehavior(AjaxHandler.java:450)</p><p>          at javax.faces.event.AjaxBehaviorEvent.processListener(AjaxBehaviorEvent.java:113)</p><p>          at javax.faces.component.behavior.BehaviorBase.broadcast(BehaviorBase.java:106)</p><p>          at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:760)</p><p>          at javax.faces.component.UICommand.broadcast(UICommand.java:300)</p><p>          at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)</p><p>          at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)</p><p>          at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)</p><p>          at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)</p><p>          at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)</p><p>          at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)</p><p>          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)</p><p>          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)</p><p>          at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)</p><p>          at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)</p><p>          at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)</p><p>          at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)</p><p>          at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)</p><p>          at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)</p><p>          at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)</p><p>          at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)</p><p>          at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)</p><p>          at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)</p><p>          at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1770)</p><p>          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)</p><p>          at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)</p><p>          at java.lang.Thread.run(Unknown Source)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks for help !!!</p></div>
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