Hi, Brian! Are you using Linux? If yes, are you using the Sun's jvm? If you have answered yes to both questions, you might be facing a situation similar to the one we are facing with our memory leak tests. Some of them fail only on Linux when using Sun's jvm. If we try running them on Windows XP, or on a different jvm (say, JRockit), they don't fail. The situation is very similar to yours: the class loader is never collected and the references to classes are held through weak references only. I haven't managed to figure out why yet. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4146910#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...