For posterity sake.... In my EJB I just injected the SessionContext and the EM: @Resource | SessionContext ejbContext; | @In | private EntityManager em; And had the EM join the transaction: UserTransaction txn = ejbContext.getUserTransaction( ); | txn.begin(); | em.joinTransaction(); | //do something | txn.commit(); Example taken from Bill's great book http://www.oreilly.com/catalog/entjbeans5/ View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4086304#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...