I guess you might find some help in the Hibernate forums, because JBoss JPA uses Hibernate as its implementation. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4205795#4205795 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4205795