for jbossas/core-libs you should be compiling against the latest 5.0.0.CR2 artifacts. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4190398#4190398 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4190398