You seem to use GNU Java that isn't supported by Eclipse. Try to install Sun JDK >= 1.5. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4212751#4212751 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4212751