[jboss-user] [JBoss jBPM] - LazyInitializationException

[ricardomarques]

Hi guys, while getting the comments for a task instance using the command interface, i'm having this exception:


  | 12:19:00,265 ERROR [LazyInitializationException] failed to lazily initialize a collection of role: org.jbpm.taskmgmt.exe.TaskInstance.comments, no session or session was closed
  | org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.jbpm.taskmgmt.exe.TaskInstance.comments, 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.readSize(AbstractPersistentCollection.java:97)
  |         at org.hibernate.collection.PersistentList.size(PersistentList.java:91)
  |         at com.pep.workflow.console.beans.Task.fetchComments(Task.java:189)
  |         at com.pep.workflow.console.beans.Task.initialize(Task.java:240)
  |         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:585)
  |         at org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:129)
  |         at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63)
  |         at javax.faces.component.UICommand.broadcast(UICommand.java:106)
  |         at javax.faces.component.UIData.broadcast(UIData.java:513)
  |         at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:94)
  |         at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:168)
  |         at org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:343)
  |         at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86)
  |         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:137)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         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)
  | 
  | 

I've have read some other post's regarding this issue but still have some question, i'm complitely newbie in hibernate, and I trying to figure out the best way to solve this.

I'm wandering if the best approach is to write my hibernate query?


thanks

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