If you don't wish to "build from source", I would suggest another trick (though untested). If you follow all the various steps outlined in this thread you'll note that I believe the problem is finally with gravel14.jar. If you go to jboss.org you can download gravel by itself and replace gravel14.jar with gravel.jar which I believe to be JDK 5 friendly. Burr View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4063982#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...