We are experiencing severe problems with perm gen leaks in the server with detaching entities (with relations). Tested on Jboss 4.0.4 with EJB3 RC9 and different JVMs up to latest 1.6.0. There is a lot of classloading going on from javassist it seems that fills perm gen? We can't use @Remote ejbs at all, in our fairly large webbapp. @Local interfaces work well. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3973489#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...