My test fails on Windows XP as well. Not every time, but most. FYI, here's how to run that test 1) Build the AS and its testsuite from trunk. 2) In on window start the AS with the all config 3) From the root of the testsuite module: ./run.sh -Dtest=org.jboss.test.cluster.classloader.leak.test.ReplicableClassesClassloaderLeakUnitTestCase one-test There's 2 methods, one uses aopc-prepared classes, the other doesn't. The former fails. But when I analyze the heap, all I see are chains leading to weak references. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4146958#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...