[jboss-user] [jBPM] - Hibernate LazyInitializationException during swimlane creation

[Anup Nair]

Anup Nair [http://community.jboss.org/people/wrecked] created the discussion

"Hibernate LazyInitializationException during swimlane creation"

To view the discussion, visit: http://community.jboss.org/message/566066#566066

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Hi All,

I am a new bie to this site. I am currently using jBPM 4 with Oracle as db.

I have created a sample workflow and using the JBPM API to create instances and moving instance from one activity to another.

However when i am trying to create a swimlane programatically i am getting *org.hibernate.LazyInitializationException*

*I am not getting an idea how the hibernate session gets closed.
*

Following is the code snippet for swimlane creation:

public void testAddParticipants() throws Exception{
        ProcessInstance processInstance = executionService.findProcessInstanceById("ServiceCenter.1");
        EnvironmentImpl    environment =(EnvironmentImpl)((EnvironmentFactory)processService).openEnvironment();
        try{
            Collection<? extends Execution> executionMap = processInstance.getExecutions();
            for (Execution execution : executionMap) {
                System.out.println(execution.getClass());
                if(execution instanceof ExecutionImpl){
                    final ExecutionImpl exec = (ExecutionImpl) execution;
                    SwimlaneImpl role = exec.createSwimlane("approver");
                    System.out.println("Approver role added:"+role);
                }

                      }
        }finally{
            environment.close();
        }
    }


The exception trace is:

### EXCEPTION ###########################################
[*LazyInitializationException] failed to lazily initialize a collection of role: org.jbpm.pvm.internal.model.ExecutionImpl.swimlanes, no session or session was closed
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.jbpm.pvm.internal.model.ExecutionImpl.swimlanes, no session or session was closed*
    at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380)
    at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372)
    at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365)
    at org.hibernate.collection.PersistentMap.put(PersistentMap.java:184)
    at org.jbpm.pvm.internal.model.ExecutionImpl.createSwimlane(ExecutionImpl.java:874)
    at com.jpmc.servicecenter.ServiceCenter.testAddParticipants(ServiceCenter.java:304)
    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 junit.framework.TestCase.runTest(TestCase.java:164)
    at junit.framework.TestCase.runBare(TestCase.java:130)
    at junit.framework.TestResult$1.protect(TestResult.java:106)
    at junit.framework.TestResult.runProtected(TestResult.java:124)
    at junit.framework.TestResult.run(TestResult.java:109)
    at junit.framework.TestCase.run(TestCase.java:120)
    at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

The jbpm.cfg.xml has the following configuration:

*<?xml version="1.0" encoding="UTF-8"?>*
** 
*<jbpm-configuration>*
** 
*  <import resource="jbpm.default.cfg.xml" />
  <import resource="jbpm.businesscalendar.cfg.xml" />
  <import resource="jbpm.tx.hibernate.cfg.xml" />
  <import resource="jbpm.jpdl.cfg.xml" />
  <import resource="jbpm.bpmn.cfg.xml" />
  <import resource="jbpm.identity.cfg.xml" />
  <import resource="jbpm.task.hbm.xml" />*
** 
*  <!-- Job executor is excluded for running the example test cases. -->
  <!-- To enable timers and messages in production use, this should be included. -->
  <!--
  <import resource="jbpm.jobexecutor.cfg.xml" />
  -->*
** 
*</jbpm-configuration>*

I am stuck with this error from the past 1 week.

please help me out.

Thanks in advance.
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