What if you try: entityManager.find(Language.class, "en "); (en with 6 spaces) Just a wild guess... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3972672#3972672 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3972672