Try using JRocket. Permgen issues are tricky and are a real problem for apps like yours that load and reload a zillion classes. Someone else can probably go into the details but JBoss isn't alone, for a quick fix grab the latest R27.2 JRocket release. JRocket handles permgen differently than Sun's JVM. No settings to tweak and generally no permgen problems either. Be sure and grab the latest, I had problems with the prior version. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4039729#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...