Contrary to my statement: anonymous wrote : The only way I've found to resolve this issue is by following the documentation for JBoss 3.2.3 - as specified on this page: | http://wiki.jboss.org/wiki/Wiki.jsp?page=ClassLoadingConfiguration changing the ear-deployer.xml DID NOT fix the class loading issue. A NoSuchMethod exception is still being thrown by my classes when trying to use a method which is part of the newer commons-httpclient.jar which is shipped with my EAR. If I delete the commons-httpclient.jar from my server/default/lib dir - no exception is thrown - this proves that classloading hierarchies are causing this problem. Anyone had similar experiences with trying to override server classes using their own version of the same libraries as shipped inside an EAR? Many thanks, Andy View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3982170#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...