[jboss-jira] [JBoss JIRA] Commented: (JBAS-4618) Thread context classloader not set during transaction commit

[Elias Ross (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBAS-4618?page=comments#action_12373196 ] 
            
Elias Ross commented on JBAS-4618:
----------------------------------

This is with JBoss 4.2.0.

And by "this error", I mean this exception

2007-07-25 11:14:41,313 ERROR [AbstractFlushingEventListener] Could not synchronize database state with session
org.hibernate.type.SerializationException: could not deserialize
at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:214)
at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:240)
at org.hibernate.type.SerializableType.fromBytes(SerializableType.java:82)
at org.hibernate.type.SerializableType.deepCopyNotNull(SerializableType.java:74)
at org.hibernate.type.MutableType.deepCopy(MutableType.java:25)
at org.hibernate.type.SerializableToBlobType.deepCopy(SerializableToBlobType.java:102)
at org.hibernate.type.TypeFactory.deepCopy(TypeFactory.java:353)
at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:114)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:515)
at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:114)
at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:249)
at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:88)
at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:177)
at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1256)
at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:135)
at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:87)
at org.jboss.resource.adapter.jms.inflow.JmsServerSession$XATransactionDemarcationStrategy.end(JmsServerSession.java:494)
at org.jboss.resource.adapter.jms.inflow.JmsServerSession.run(JmsServerSession.java:248)
at org.jboss.resource.work.WorkWrapper.execute(WorkWrapper.java:204)
at org.jboss.util.threadpool.BasicTaskWrapper.run(BasicTaskWrapper.java:275)
at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:743)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.ClassNotFoundException: No ClassLoaders found for: com.example.msg.ScopedClass
at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:306)
at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:514)
at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:408)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:574)
at org.hibernate.util.SerializationHelper$CustomObjectInputStream.resolveClass(SerializationHelper.java:268)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1538)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:210)
... 28 more	


> Thread context classloader not set during transaction commit
> ------------------------------------------------------------
>
>                 Key: JBAS-4618
>                 URL: http://jira.jboss.com/jira/browse/JBAS-4618
>             Project: JBoss Application Server
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>            Reporter: Elias Ross
>
> I modified a serializable object, part of an EJB3 Entity, during an MDB.onMessage() call. Hibernate attempts to update this serializable object during the transaction commit, but fails because it cannot load the class from the classloader. For example, if one modifies an entity such as:
> @Entity
> public class Foo {
>   Serializable bar;
> ...
> }
> in an MDB
> public class MDB implements MessageListener {
>   @PersistenceContext
>   EntityManager em;
>   public void onMessage() {
>     Foo f = em.load(...);
>     f.setBar(new ScopedClass());
>   }
> }
> you get this error.
> The thread context classloader is assigned when processing the message. Is it cleared after message processing or after transaction completion? From my limited understanding of the code, it seems like the former. There appears to be an invoker that sets and clears during processing, but the clear apparently happens before transaction commit.
> Ordinarily, transaction commit does not require the context classloader of the .ear file, but in this case it does.

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