As far as I understand jboss classloading, for every application a ucl (you can find out which ucl it is by mydeploymentinfo.ucl ) is created when the application is deployed, that does the classloading for this application. Is there any possibility to substitute this ucl with a custom classloader (which extends URLClassloader), so that this custom classloader is responsible for the classloading of the application? Thank you for your answers! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3987832#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...