may be related to http://www.jboss.com/index.html?module=bb&op=viewtopic&t=104346 Hello, After many searches, many headaches, I've reached the end and I still doesn't find a way to achieve what I want. I have 2 wars containing the same lib. These 2 wars are deployed in default/deploy. They also use spring.jar that I want them to share, I put it in default/lib of my server. My deployment strategy is : - what is common but not made by me (hibernate, spring, jsf, ...) is put under default/lib - what is common but made by me is deployed within each of my wars. If I deploy only one war, my application works well. If I add the second one, then I get something that looks like classcastException : spring tells me it can't set a value to a property arguing they are not from the same type. I tried to use a specific class-loading in my jboss-web.xml : <class-loading> | <loader-repository> | toto:loader=war1 | </loader-repository> | </class-loading> for the first war, and <class-loading> | <loader-repository> | toto:loader=war2 | </loader-repository> | </class-loading> for the 2nd one. It doesn't change anything. So please someone help me. Regards, dom View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4030720#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...