Sandra Renaud [https://community.jboss.org/people/joploya] created the discussion "getProcess in ProcessInstanceImpl throws a NullPointerException" To view the discussion, visit: https://community.jboss.org/message/806156#806156 -------------------------------------------------------------- Hello, I have a NullPointerException when I set process variables and I don't know if it is normal. The exception comes from this code of jbpm :    //In ProcessInstanceImpl    public Process getProcess() {         if (this.process == null) {             this.process = kruntime.getKnowledgeBase().getProcess(processId);         }         return this.process;     } and this is the StackTrace : SEVERE [javax.faces.event] (http--127.0.0.1-8080-2) java.lang.NullPointerException           at org.jbpm.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:68)           at org.jbpm.process.instance.impl.ProcessInstanceImpl.getContextInstance(ProcessInstanceImpl.java:133)           at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.setVariable(WorkflowProcessInstanceImpl.java:238)           at com.st.ams.task.management.TaskManager.setProcessVariable(TaskManager.java:234)           at com.st.ams.task.management.TaskManager$Proxy$_$$_WeldClientProxy.setProcessVariable(TaskManager$Proxy$_$$_WeldClientProxy.java)           at com.st.ams.form.nfg.jbpm.process.NewFinishedGoodProcessManagement.manageInstanceFgPlanStep2(NewFinishedGoodProcessManagement.java:149)           at com.st.ams.form.nfg.jbpm.process.NewFinishedGoodProcessManagement.manageInstancePlan(NewFinishedGoodProcessManagement.java:89)           at com.st.ams.form.nfg.jbpm.process.NewFinishedGoodProcessManagement.manageInstance(NewFinishedGoodProcessManagement.java:71)           at com.st.ams.form.nfg.jbpm.process.NewFinishedGoodProcessManagement$Proxy$_$$_WeldClientProxy.manageInstance(NewFinishedGoodProcessManagement$Proxy$_$$_WeldClientProxy.java)           at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)           at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)           at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)           at java.lang.reflect.Method.invoke(Method.java:601)           at org.jboss.weld.util.reflection.SecureReflections$13.work(SecureReflections.java:264)           at org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52)           at org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInvocation(SecureReflectionAccess.java:137)           at org.jboss.weld.util.reflection.SecureReflections.invoke(SecureReflections.java:260)           at org.jboss.weld.introspector.jlr.WeldMethodImpl.invokeOnInstance(WeldMethodImpl.java:170)           at org.jboss.weld.introspector.ForwardingWeldMethod.invokeOnInstance(ForwardingWeldMethod.java:51)           at org.jboss.weld.injection.MethodInjectionPoint.invokeOnInstanceWithSpecialValue(MethodInjectionPoint.java:154)           at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:241)           at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:229)           at org.jboss.weld.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:207)           at org.jboss.weld.manager.BeanManagerImpl.notifyObservers(BeanManagerImpl.java:569)           at org.jboss.weld.manager.BeanManagerImpl.fireEvent(BeanManagerImpl.java:564)           at org.jboss.weld.event.EventImpl.fire(EventImpl.java:68)           at com.st.ams.form.bean.EmailBean.send(EmailBean.java:148)           at com.st.ams.form.bean.EmailBean$Proxy$_$$_WeldClientProxy.send(EmailBean$Proxy$_$$_WeldClientProxy.java)           at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)           at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)           at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)           at java.lang.reflect.Method.invoke(Method.java:601)           at org.apache.el.parser.AstValue.invoke(AstValue.java:262)           at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278)           at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39)           at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)           at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:153)           at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)           at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:769)           at javax.faces.component.UICommand.broadcast(UICommand.java:300)           at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)           at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)           at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)           at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)           at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)           at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329)           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)           at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)           at org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62)           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)           at org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65)           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)           at org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74)           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)           at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)           at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)           at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:397)           at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50)           at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153)           at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155)           at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)           at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)           at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368)           at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)           at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671)           at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930)           at java.lang.Thread.run(Thread.java:722) WARN  [org.jboss.solder.exception.control.log] (http--127.0.0.1-8080-2) No handlers found for exception javax.faces.event.AbortProcessingException: java.lang.NullPointerException I use persistent session and WorkflowProcessInstance wpi = (WorkflowProcessInstance)kSession.getProcessInstance(processInstanceId); return a non null instance. Regards, -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/806156#806156] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]