I want to use my own common-collections.jar in my ear/war, as while invoking i am getting some serialization exception because the same class ListOrderedMap(which is inside common-collection.jar) is getting loaded by two loaders and while serialization it gives classcast exception. The class loader isolation steps are not solving the purpose. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4199098#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...