[jboss-dev-forums] [Design of JBoss jBPM] - Help with a Jbpm error

[francesco.franze]

Hi all, I'm trying to retrieve the value of some variables added to a remote jbpm process, but when I request the ContextIstance it gaves this error 

org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.jbpm.context.exe.TokenVariableMap.variableInstances, no session or session was closed

I tryed another way to catch the variables, with the following code



		ProcessInstance processInstance1=this.prendiIstanzaWorkflow(workflowDT);
		VariablesCommand variabile= new VariablesCommand();
		 token = processInstance1.getRootToken();
		
		variabile.setTokenId(token.getId());
		Object o=servizioWorkflowJbpm.execute(variabile); 
		TokenVariableMap tmv=(TokenVariableMap) o;
		ContextInstance cc=tmv.getContextInstance();
		Map map = cc.getVariables();


but the error is the same Can someone help me? Thanks.
There the full stack trace

ERROR [org.hibernate.LazyInitializationException] - failed to lazily initialize a collection of role: org.jbpm.context.exe.TokenVariableMap.variableInstances, no session or session was closed
 org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.jbpm.context.exe.TokenVariableMap.variableInstances, no session or session was closed
	at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
	at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
	at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)
	at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
	at org.hibernate.collection.PersistentMap.entrySet(PersistentMap.java:206)
	at org.jbpm.context.exe.VariableContainer.getVariablesLocally(VariableContainer.java:119)
	at org.jbpm.context.exe.VariableContainer.getVariables(VariableContainer.java:106)
	at org.jbpm.context.exe.ContextInstance.getVariables(ContextInstance.java:106)
	at org.jbpm.context.exe.ContextInstance.getVariables(ContextInstance.java:95)
	at com.linksmt.fpap.services.WorkflowJbpmService.prendiInfo(WorkflowJbpmService.java:109)
	at com.linksmt.fpap.services.WorkflowJbpmService.infoStatoCorrente(WorkflowJbpmService.java:76)
	at com.linksmt.fpap.controllers.TestWorkflowController.handleRequestInternal(TestWorkflowController.java:31)
	at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:874)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:808)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:523)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:453)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
	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:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	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:263)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)


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