Deploying the same file again, but without the jars log4j and commons-logging. Wolla!!, It seems to work. Isn't this a classloader bug/error? What I mean is. The files I put in my ear are those I want to use, especially in isolated mode. It shall not matter if a put a log4j jar in my ear, it shall override the one in the server/default/lib folder. I think this is very important when delivering ready to install archives (an archive I can send to a customer just telling him "drop the ear in the deploy folder and that's it"). //Oskar View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4029081#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...