JBossAS uses log4j to do its logging. The best place to get information on it is the log4j web site http://logging.apache.org/log4j/1.2/manual.html or pick up a log4j book (the online docs are not very detailed) The only additional piece of of information you need is that JBossAS comes with its own appenders - they extend the original log4j appenders adding extra code to create the server/xxx/log directory is it does not already exist. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4193073#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...