This is in fact a bug: http://jira.jboss.org/jira/browse/JBAOP-406 We will let you know once it is fixed. However, I think this won't affect your application. This error just means that JBoss AOP isn't being able of transforming proxy classes. Aren't you getting a warning message like the one below besides the stack trace? | [warn] AOP Instrumentor failed to transform $Proxy85 | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4049585#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...