Yes, having your own copy of lg4j.xml can cause this. Most likely, your log messages are going to stdout, which is intercepted by log4j within JBoss, with the end resulting being what you see. The typical way of logging in JBoss AS is to not have any logging-related info in your app (no log4j.properties or xml, no logging JAR files), and to instead define your logging in the server/xxx/conf/jboss-log4j.xml file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4200423#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...