We do not allow instrumentation of the JBoss AOP classes. If you are running in JBoss, an option right now might be to subclass the AspectDeployer and then to parse the xml file being undeployed yourself to generate the notifications (See AspectXmlLoader), before/after doing the real work from the AspectDeployer? You would need to update the jboss-aop.deployer/META-INF/jboss-service.xml file to point to your subclass for the AspectDeployer service View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961830#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...