It looks like there is a problem in CFlow.loadClass() trying to load internal sun.* classes if they are on the stack trace. I don't have time to fix this now, but if you want you could patch this yourself and attach a patch along with a test to a JIRA issue? Basically, in matchesClass(), if the stack trace element class name starts with "sun." don't attempt to load the class and return false. http://anonsvn.jboss.org/repos/jbossas/branches/Branch_AOP_1_5/ View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4260997#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...