The two classpool implementations need to be merged. e.g. The jboss retro implementation understands context classloading better (see fixmes in AOP code) and also doesn't need a specific callback to avoid memory leaks. e.g.2. The jboss retro implementation doesn't understand the overriding of the class file into "/tmp" that the JBossClassPool does. I think javassist would be the correct place for a full implementation of a classpool that better understands context classloading. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3956941#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...