Scheduler issue in web app with mixed jBPM and Pageflow
Hi everyone,
I'm trying to get a scheduled reminder to work in my jBPM process:
<reminder duedate="1 minute" repeat="30 seconds"/>
This work in the sense that 1 minute after the task has been started/assigned I start getting reminder-emails. But when the task (a nested pageflow) ends with:
<page name="showIncompleteTasksApprove" view-id="/secure/taskList.jsp"> <end-task transition="Approve"/> <redirect/> </page>
I get this exception:
14:37:39,174 WARN [ProxyWarnLog] Narrowing proxy to class org.jbpm.graph.node.TaskNode - this opera tion breaks == 14:37:39,185 ERROR [GraphElement] action threw exception: service 'scheduler' unavailable org.jbpm.svc.JbpmServiceException: service 'scheduler' unavailable at org.jbpm.svc.Services.getCurrentService(Services.java:97) at org.jbpm.svc.Services.getCurrentService(Services.java:87) at org.jbpm.scheduler.def.CancelTimerAction.execute(CancelTimerAction.java:45) at org.jboss.seam.bpm.SeamUserCodeInterceptor$1.process(SeamUserCodeInterceptor.java:80) at org.jboss.seam.bpm.SeamUserCodeInterceptor$ContextualCall.run(SeamUserCodeInterceptor.java:33) at org.jboss.seam.bpm.SeamUserCodeInterceptor.executeAction(SeamUserCodeInterceptor.java:74) at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:254) at org.jbpm.graph.def.GraphElement.executeActions(GraphElement.java:212) at org.jbpm.graph.def.GraphElement.fireAndPropagateEvent(GraphElement.java:182) at org.jbpm.graph.def.GraphElement.fireEvent(GraphElement.java:166) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java :173) at org.jbpm.taskmgmt.def.Task_$$_javassist_2023.fireEvent(Task_$$_javassist_2023.java) at org.jbpm.taskmgmt.exe.TaskInstance.end(TaskInstance.java:444) at org.jbpm.taskmgmt.exe.TaskInstance.end(TaskInstance.java:413) at org.jboss.seam.bpm.BusinessProcess.endTask(BusinessProcess.java:214) at org.jboss.seam.pageflow.Page.execute(Page.java:103) at org.jbpm.graph.def.Node.enter(Node.java:314) at org.jbpm.graph.def.Transition.take(Transition.java:151) at org.jbpm.graph.def.Node.leave(Node.java:389) at org.jbpm.graph.exe.Token.signal(Token.java:192) at org.jbpm.graph.exe.Token.signal(Token.java:155) at org.jbpm.graph.exe.ProcessInstance.signal(ProcessInstance.java:283) at org.jboss.seam.pageflow.Pageflow.signal(Pageflow.java:485) at org.jboss.seam.pageflow.Pageflow.navigate(Pageflow.java:341) at org.jboss.seam.jsf.SeamNavigationHandler.handleNavigation(SeamNavigationHandler.java:40) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:130) at javax.faces.component.UICommand.broadcast(UICommand.java:387) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:755) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290 ) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:54) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73) at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235 ) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235 ) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:524) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) at java.lang.Thread.run(Thread.java:619)
The task was started with
@In private Pageflow pageflow;
@StartTask
public String startTask() {
pageflow.begin(TaskInstance.instance().getName());
initializeProcessVariables();
return SECUREPAGESDIR + TaskInstance.instance().getName() + ".jsp";
}My theory is that, Seam has in some way made the jbpmContext invisible for the nested action endTask and this causes CancelTimerAction to fail in retrieving a reference to the scheduler-service. Without the reminder-tag, ending the task works fine.
- Does theory this sound right?
- Is there anything I can do about it?
(This is a continuation of a jBPM forum thread.)
