I think that @Begin(join=true, flushMode=FlushModeType.MANUAL) works only for seam managed persistence context View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4083383#4083383 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4083383