anonymous wrote : Caused by: javax.management.InvalidAttributeValueException: Set attribute has class class javax.management.ObjectName loaded from null that is not assignable to attribute class class javax.management.ObjectName loaded from BaseClassLoader@d99967{vfszip:/D:/projects/jboss-5.1.0.GA/server/default/deploy/mad.war/} Are you packaging any jar files containing javax.management.* classes? If yes remove those jars from your application packaging. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4258443#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...