Sorry, I'll answer a couple of my own questions after a little more research: No default JNDI name for entity manager, so iI need to explicitly include it in persistence.xml. I still can't get the JNDI lookup to work, though. I also tried using Resource injection (suggested in another post), but I end up with a null entity manager. Thanks. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4017810#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...