hi, can anyone help me:
there is a testcase 'org.jbpm.test.activities.SubProcessTest' in module 'test-pojo' which is run in object-mode.
and so i try to write a subprocess testcase running in persistent-mode. i have been trying but i can not make it... exception comes out:

10:37:11,250 SEV | [LazyInitializationException] could not initialize proxy - no Session
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
 at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:57)
 at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:111)
 at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:150)
 at org.jbpm.pvm.internal.model.ActivityImpl$$EnhancerByCGLIB$$fa091528.getParentActivity(<generated>)
 at org.jbpm.pvm.internal.model.ExecutionImpl.initializeScopes(ExecutionImpl.java:210)
 at org.jbpm.pvm.internal.model.ExecutionImpl.start(ExecutionImpl.java:193)
 at org.jbpm.pvm.internal.model.ExecutionImpl.beginSubProcessInstance(ExecutionImpl.java:882)
 at name.galanfish.test.super_sub_process.cmd.StartSubProcessCmd.execute(StartSubProcessCmd.java:33)
 at name.galanfish.test.super_sub_process.cmd.StartSubProcessCmd.execute(StartSubProcessCmd.java:1)
 at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42)
 at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:54)
 at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:40)
 at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:52)
 at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.beginSubProcess(ExecutionServiceImpl.java:84)
 at name.galanfish.test.super_sub_process.SubProcess.execute(SubProcess.java:36)
 at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(ExecuteActivity.java:57)
 at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java:587)
 at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java:560)
 at org.jbpm.pvm.internal.model.ExecutionImpl.signal(ExecutionImpl.java:384)
 at org.jbpm.pvm.internal.cmd.SignalCmd.execute(SignalCmd.java:62)
 at org.jbpm.pvm.internal.cmd.SignalCmd.execute(SignalCmd.java:1)
 at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42)
 at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:54)
 at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:40)
 at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:52)
 at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.signalExecutionById(ExecutionServiceImpl.java:121)
 at name.galanfish.test.super_sub_process.SuperSubProcessTest.testSimpleSuperSubProcess(SuperSubProcessTest.java:38)
 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 junit.framework.TestCase.runTest(TestCase.java:164)
 at org.jbpm.test.BaseJbpmTestCase.runTest(BaseJbpmTestCase.java:81)
 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 junit.framework.TestSuite.runTest(TestSuite.java:230)
 at junit.framework.TestSuite.run(TestSuite.java:225)
 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:460)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)

public class SuperSubProcessTest extends EnvironmentFactoryTestCase {

 private JbpmConfiguration factory;
 private ProcessServiceImpl processService;
 private ExecutionService executionService;


 @Override
 protected void setUp() throws Exception {
 super.setUp();
 factory = (JbpmConfiguration) getEnvironmentFactory();
 processService = (ProcessServiceImpl) factory.getProcessService();
 executionService = factory.getExecutionService();
 }

 public void testSimpleSuperSubProcess(){
 createAndDeploySimpleSuperSubProcess();
 executionService.startProcessInstanceById("super2:1", "superrequest8");
 executionService.signalExecutionById("super2/superrequest8", "to_one");
 }

 private void createAndDeploySimpleSuperSubProcess(){
 ClientProcessDefinition superProcess = ProcessDefinitionBuilder.startProcess("super2")
 .startActivity("start", WaitState.class)
 .initial()
 .transition("one", "to_one")
 .endActivity()

 .startActivity("one", AutomaticActivity.class)
 .transition("sub", "to_sub")
 .endActivity()

 .startActivity("sub", SubProcess.class)
 .transition("end", "to_end")
 .endActivity()

 .startActivity("end", AutomaticActivity.class)
 .endActivity()
 .endProcess();

 ClientProcessDefinition subProcess = ProcessDefinitionBuilder.startProcess("sub2")
 .startActivity("start", AutomaticActivity.class)
 .initial()
 .transition("end", "to_end")
 .endActivity()

 .startActivity("end", EndState.class)
 .endActivity()
 .endProcess();

 deployProcess(superProcess);
 deployProcess(subProcess);
 }

 private void deployProcess(ProcessDefinition process){
 Deployment deployment = processService.createDeployment();
 deployment.addObject("process", process);
 processService.deploy(deployment);
 }
}

public class SubProcess implements ExternalActivityBehaviour{

 private static final long serialVersionUID = 1L;

 public void signal(ActivityExecution execution, String signalName, Map<String, Object> parameters) throws Exception {

 }

 public void execute(ActivityExecution execution) throws Exception {
 ProcessService processService = Environment.getFromCurrent(ProcessService.class);
 ClientProcessDefinition subProcess = (ClientProcessDefinition)processService.findLatestProcessDefinitionByKey("sub2"); // hard code

 ExecutionService exeService = Environment.getFromCurrent(ExecutionService.class);
 // i add method 'beginSubProcess' in ExecutionService which is to execute the command 'StartSubProcessCmd'(source code as follow)
 Execution subExecution = exeService.beginSubProcess(execution, subProcess, "subrequest1"); // hard code
 if(!subExecution.isEnded()){
 execution.waitForSignal();
 }
 }
}

public class StartSubProcessCmd extends AbstractCommand<Execution>{

 private static final long serialVersionUID = 1L;

 private ActivityExecution parentExecution;
 private ProcessDefinition subProcess;
 private String key;
 public StartSubProcessCmd(Execution parentExecution, ProcessDefinition subProcess, String key){
 this.parentExecution = (ActivityExecution)parentExecution;
 this.subProcess = subProcess;
 this.key = key;
 }

 public Execution execute(Environment environment) throws Exception {
 ClientExecution subExecution = parentExecution.beginSubProcessInstance((ClientProcessDefinition) subProcess, key);
 return subExecution;
 }
}