I have just found out that Spring uses the following code to retrieve the classloader: Thread.currentThread().getContextClassLoader() and the classloader returned by this piece of code is a UCL (/D:/applications/jboss-4.0.5.GA/server/default/conf/) tied to the universalrepository3 and not the HeirarchicalLoaderRepository3 of my ear. Of course, since Jboss created the threads i guess that it's normal that the classloader associated to the thread can not be a classloader that will use the HeirarchicalLoaderRepository3. But i still don't have any solution on this problem. Is it possible to configure the threads created by Jboss to make them return the classloader of the ear ? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4071578#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...