I created a standalone test case (depends only on java, servlet api and javassist 3.9.0.GA.
You can download the war on the following URL (google drive) https://docs.google.com/file/d/0BxXbVMAMFEYOWHJ3a09YRnE4N1U/edit?usp=sharing On geronimo 2.2 the servlet GET method can be executed successfully as many times as you like. On geronimo 3.0.1 the first execution of the GET method throws the error I have mentioned. I think it would be interesting to see what the second execution does. Regards // Dimitris -- View this message in context: http://apache-geronimo.328035.n3.nabble.com/Classes-generated-on-runtime-javassist-classloader-issue-tp3987097p3987116.html Sent from the Users mailing list archive at Nabble.com.