It would appear that the xpcResolver isn't injected into the PersistenceUnitDeployment. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4186749#4186749 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4186749