It seems that several hibernate sessions are in one way sharing the same Transaction.

Let me explain my problem:

I've 2 different EJBs, the first one (i will call it 'EJBA') is stateful, and call
the second one (i will call it 'EJBB') is stateless.

Here is what I'm doing:

Scenario 1:
1. EJBA is instanciated
2. An hibernate session (A) is associated to EJBA:
InitialContext ic = new InitialContext();
SessionFactory sessionFactory = (SessionFactory) PortableRemoteObject.narrow(ic.lookup(
"java:/HibernateFactory"), SessionFactory.class);
hibernateSession = sessionFactory.openSession();
3. trA= hibernateSession.beginTransaction() is done (on session A)
4. Two queries are done against the session (A) in EJBA, i will call them 'QueryA1' and 'QueryA2'
5. hibernateSession (session A) .isDirty()? returns true
==> OK, i agree
6. A function of EJBB is called by EJBA, inside this function, the EJBB get a session (B) to do some queries:
InitialContext ic = new InitialContext();
SessionFactory sessionFactory = ( SessionFactory ) PortableRemoteObject.narrow( ic.lookup( "java:/HibernateFactory" ), SessionFactory.class );
Session session= sessionFactory.openSession();
7. session (session B) .isDirty? returns false
==> OK, i agree
1st conclusion: session A and session B are two different sessions (it is was I'm expecting)
8. trB= session.beginTransaction() is done (on session B)
9. A query is done against the session (B) in EJBB, i will call it 'QueryB1'
10. trB.commit() is called (I mean i want to commit the QueryB1 made by EJBB inside session B.
11. session B is closed
12. (back to EJBA)
trA.rollback() is issued by EJBA (to rollback QueryA1 and QueryA2.
13. Have a look at the result in database:
Everything is rollbacked! (my step 10 commit is ignored!).


Scenario 2:
Replacing the step 12 by a trA.commit(), then in step 13 everything is commited.

Scenario 3:
Same as scenario 1, but I continue after the trA.rollback().
Since I've rollbacked the 'QueryA1' and 'QueryA2', I want to commit a 'QueryA3'.
14. trA= hibernateSession.beginTransaction() is done (on session A) [again]
I get the exception:
16:42:23,611 ERROR [JTATransaction] Could not register Synchronization
javax.transaction.RollbackException: Already marked for rollback
at org.jboss.tm.TransactionImpl.registerSynchronization(TransactionImpl.java:689)
at net.sf.hibernate.transaction.JTATransaction.begin(JTATransaction.java:169)
at net.sf.hibernate.transaction.JTATransactionFactory.beginTransaction(JTATransactionFactory.java:58)
at net.sf.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:2195)
at com.eft.cbk.kernel.tar.business.TARTasks.createCaseInCBK(TARTasks.java:251)
15. A function of EJBB is called by EJBA, inside this function, the EJBB get a session (B) to do some queries:
InitialContext ic = new InitialContext();
SessionFactory sessionFactory = ( SessionFactory ) PortableRemoteObject.narrow( ic.lookup( "java:/HibernateFactory" ), SessionFactory.class );
Session session= sessionFactory.openSession();
16. session (session B) .isDirty? returns false
==> OK, i agree
1st conclusion: session A and session B are two different sessions (it is was I'm expecting)
17. trB= session.beginTransaction() is done (on session B)
I get the exception:
16:42:23,440 ERROR [JTATransaction] Could not register Synchronization
javax.transaction.RollbackException: Already marked for rollback
at org.jboss.tm.TransactionImpl.registerSynchronization(TransactionImpl.java:689)
at net.sf.hibernate.transaction.JTATransaction.begin(JTATransaction.java:169)
at net.sf.hibernate.transaction.JTATransactionFactory.beginTransaction(JTATransactionFactory.java:58)
at net.sf.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:2195)
at com.eft.cbk.v2x.database.api.entity_seq.Entity_seqTable.getEntitySeq(Entity_seqTable.java:74)


What is wrong?
I have two different beans, with each a different hibernate session that should work with two different transactions.
It seems the sessions differs, but there is a "link" between the both transactions.

Help would be greatly appreciated.

Environment:
JBoss: 3.2.3
Hibernate: 2.1.2
Sun JDK: j2sdk1.4.2_03
OS: Windows 2000
Database: Thin Driver Oracle 8.1.7