As far as I can see it is only triggered once (looking at the log file) for a default jboss run (includes an EJB 3 bean and a few other test deployers). In fact I am trying to understand the exact relationships and rules existing between the classloader that seem to be created by the structure deployers and the "DESCRIBE" and "CLASSLOADER" deployers. I discovered HackClassloaderMetaDataDeployer and though "That's probably a good one to start with" but then I was troubled when I realized it was only called when "console-mgr.sar" is being deployed... I initially though that the fact it does not set input/outputs would have meant it matches all deployments (or perhaps none)... But that does not seem to be the case... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4126270#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...