java.lang.IllegalStateException: Exception Description: Cannot use an EntityTransaction while using

[Girish Vasmatkar]

Hello to all.

I am new to JPA thing and i have been given a code to debug. The initial implementation involved using EclipseLink but we had memory leak issues with that
now we switched to Toplink and the issue is solved now.
But it creates another problem ...

The persisting code(the code which persists the entities) actually uses EntityTransaction as well as UserTransaction(Please clarify me on this as to what is the difference between them as I am new to JPA) and my persistence.xml has this line

  <persistence-unit name="my-jpaPU" transaction-type="JTA">  

the code works fine when using eclipselink but as i mentioned earlier that we switched to toplink,when run with Toplink in operation it gives the following error

  java.lang.IllegalStateException: 
Exception Description: Cannot use an EntityTransaction while using JTA.
        at oracle.toplink.essentials.internal.ejb.cmp3.transaction.JTATransactionWrapper.getTransaction(JTATransactionWrapper.java:66)
        at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerImpl.getTransaction(EntityManagerImpl.java:340)
 

I don't know what is happening here. Can any one please suggest me a workaround for this problem. I can't seem to understand why eclipselink is allowing that code to run successfully.

Here is the code... The code is written in such a way that when I want to persist an Entity I first get EntityTransaction usninn below method and then persist the file using
em.persist(entity) and then calling -commitTransaction() method

   

 private EntityTransaction _openTransaction() {
      
        try {
            LOG.debug("openTransaction: _manageTransactions: " + _manageTransactions + " - em.isOpen:" +
                    em.isOpen());
            System.out.println("");
            if (_manageTransactions || em.isOpen()) {
                EntityTransaction tx = null;
                try {
                    tx = em.getTransaction();
                } catch (Throwable ex) {
                    LOG.warn(ex.getMessage(), ex);
                    LOG.warn("CANNOT MANAGE TRANSACTIONS FOR " + em);
                }
                if (tx != null) {
                    if (!tx.isActive()) {
                        LOG.debug("beginning transaction");
                        tx.begin();
                    } else {
                        LOG.debug("transaction already active");
                    }
                    return tx;
                }
            }
            LOG.debug("returning null as transaction...");
            return null;
        } finally {
            if (utx != null) {
                try {
                    utx.begin();
                } catch (Throwable ex) {
                    LOG.warn(ex.getMessage());
                }
            }
        }
    } 

and another method is

   
private void _commitTransaction(final EntityTransaction tx) throws Exception {
        
        try {
            LOG.debug("_commitTransaction: " + tx + " - " + utx);

            if (tx != null && tx.isActive()) {
                LOG.debug("commiting transaction: " + tx);
             
                tx.commit();

            }
            try {
                LOG.debug("flushing...." + em.getFlushMode());
              
                em.flush();
               
            } catch (Throwable ex) {
                LOG.warn(ex.getMessage());
            }
        } finally {
            
            try {
                if (utx != null) {
                   
                    utx.commit();
                    em.clear();
                }
            } catch (javax.transaction.RollbackException rex) {
                LOG.warn("Cannot commit: " + rex.getMessage());
            //throw rex;
            } catch (Throwable ex) {
                LOG.warn(ex.getMessage());
            }
              
        }
    }

 

Thanks in advance for any help.....

[Girish Vasmatkar]

Any one there? I would be grateful for ant help....