Sorry, I certainly meant SYNCHRONIZED (not serialized). [Offtopic: Why can't one edit posts?] View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4113416#4113416 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4113416