[jboss-user] [JBoss jBPM] - Timer problem

[sonicfab]

I am testing a very simple process containing only one node, in which a basic timer is declared. The process is called by the doGet method of a basic servlet :

  | protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  | 		
  |         // config
  | 		JbpmConfiguration jbpmConfiguration = (JbpmConfiguration) SpringHelper.getBean(SpringBeans.JBPM_CONFIGURATION);
  | 		
  | 		JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
  | 		
  | 		
  | 		ProcessDefinition processDefinition = ProcessDefinition.parseXmlString(
  | 				"<process-definition name=\"toto\" >"+
  | 				   "<start-state name=\"start'\">"+
  | 				      "<transition name=\"\" to=\"TimerNode\"></transition>"+
  | 				   "</start-state>"+
  | 				   "<node name=\"TimerNode\"> "+
  | 				   	"<timer name=\"Timer\" "+
  | 				   		"duedate=\"1 business minute\" >"+
  | 				   	"</timer>"+
  | 				      "<transition name=\"\" to=\"end1\"></transition>"+
  | 				   "</node>"+
  | 				   "<end-state name=\"end1\"></end-state>"+
  | 				"</process-definition>"
  | 				);
  | 
  |         ProcessInstance instance = new ProcessInstance(processDefinition);
  |         jbpmContext.save(instance);
  |         
  |         instance.signal();
  |         
  | 	}  	
  | 

The process is instantiated correctly, but I get Hibernate errors when the the signal() method is called :


  | 10:17:20,117 INFO  [STDOUT] 10:17:20,117 ERROR [[ServletTestJbpm]] Servlet.service() for servlet ServletTestJbpm threw exception
  | org.jbpm.JbpmException: couldn't cancel timers 'Timer' for 'Token(/)'
  |         at org.jbpm.db.JobSession.cancelTimersByName(JobSession.java:178)
  |         at org.jbpm.scheduler.db.DbSchedulerService.deleteTimersByName(DbSchedulerService.java:47)
  |         at org.jbpm.scheduler.def.CancelTimerAction.execute(CancelTimerAction.java:46)
  |         at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:255)
  |         at org.jbpm.graph.def.GraphElement.executeActions(GraphElement.java:220)
  |         at org.jbpm.graph.def.GraphElement.fireAndPropagateEvent(GraphElement.java:190)
  |         at org.jbpm.graph.def.GraphElement.fireEvent(GraphElement.java:174)
  |         at org.jbpm.graph.def.Node.leave(Node.java:381)
  |         at org.jbpm.graph.def.Node.leave(Node.java:357)
  |         at org.jbpm.graph.def.Node.execute(Node.java:349)
  |         at org.jbpm.graph.def.Node.enter(Node.java:318)
  |         at org.jbpm.graph.def.Transition.take(Transition.java:151)
  |         at org.jbpm.graph.def.Node.leave(Node.java:393)
  |         at org.jbpm.graph.node.StartState.leave(StartState.java:70)
  |         at org.jbpm.graph.exe.Token.signal(Token.java:194)
  |         at org.jbpm.graph.exe.Token.signal(Token.java:139)
  |         at org.jbpm.graph.exe.ProcessInstance.signal(ProcessInstance.java:270)
  |         at com.bt.intfwk.testjbpm.ServletTestJbpm.doGet(ServletTestJbpm.java:66)
  |         at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
  |         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  |         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
  |         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
  |         at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
  |         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  |         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
  |         at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
  |         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
  |         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
  |         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
  |         at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
  |         at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
  |         at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
  |         at java.lang.Thread.run(Thread.java:595)
  | Caused by: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: org.jbpm.graph.exe.
  | ProcessInstance
  |         at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:219)
  |         at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397)
  |         at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:242)
  |         at org.hibernate.type.TypeFactory.findDirty(TypeFactory.java:597)
  |         at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:3123)
  |         at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:472)
  |         at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:197)
  |         at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:120)
  |         at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)
  |         at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
  |         at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:35)
  |         at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:969)
  |         at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1114)
  |         at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
  |         at org.jbpm.db.JobSession.cancelTimersByName(JobSession.java:166)
  |         ... 38 more
  | 


Help would be greatly appreciated.

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