It seems that SeamPhaseListener does lots of stuff for transaction on the with JSF. When the entitymanager is injected on my SessionBean. If we are on a JSF request the entityManager look like : anonymous wrote : | em = EntityManagerProxy | em.delegate = EmtityManagerImpl | | em.delegate.tx = TransactionImpl | em.delegate.tx.tx = JDBCTransaction | However, if a receive a request an create a ContextualHttpRequest on my custom servlet, the injected entityManager looks like : anonymous wrote : | em = EntityManagerProxy | em.delegate = EmtityManagerImpl | | em.delegate.tx = TransactionImpl | em.delegate.tx.tx = null | The underlying transaction is null ! Think that info can be usefull. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4118412#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...