I have tried with jboss-4.0.1, you should have the following file boss-4.0.1/server/all/conf/log4j.xml You should find the code commented as suggested by Peter | <appender name="FILE" class="org.jboss.logging.appender.RollingFileAppender"> | <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/> | <param name="File" value="${jboss.server.log.dir}/server.log"/> | <param name="Append" value="true"/> | <param name="MaxFileSize" value="500KB"/> | <param name="MaxBackupIndex" value="20"/> | <layout class="org.apache.log4j.PatternLayout"> | <param name="ConversionPattern" value="%d %-5p [%c] %m%n"/> | </layout> | </appender> | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4179060#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...