The cause is almost certainly that the dependencies have changed recently, e.g. the new version of the JAXB jar added recently. But the eclipse files were never updated. e.g. I have both 1.0.2 and 1.1 in my local maven repository so either is valid for me and I wouldn't notice this problem. What do you get when you do mvn eclipse:eclipse? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4062483#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...