it's useful links, i already read them. But still have no answer..
I'm not 100% sure but I think you can't.
Because the Classloader try to find the class from previous classloader if not found.
Only way IMHO is to pack the JAR into each ear and NOT into the lib directory
I thought it would help me :
" Isolation with Overriding Server Classes
Use the following constructs to enabled scoped class loading with the deployment classes overriding the server classes."
Because in this case (when I am using Isolation with Overriding) ClassLoader couldn't find some other class..It's very strange for me.