I mean @Stateless. (Dummy code for understanding only) I think! when you are working on an existing entity & you modify that entity. After your parent transaction is over, we expect your entity manager will be flushed automatically & your entity will be updated in the database. In my case entity manager is injected in every ComponentBean. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4235150#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...