Try this one: <!-- A size based rolling appender --> | <appender name="MYAPPENDER" class="org.apache.log4j.RollingFileAppender"> | <param name="File" value="D:/log/myLogFile.log"/> | <param name="Append" value="false"/> | <param name="MaxFileSize" value="50MB"/> | <param name="MaxBackupIndex" value="20"/> | <layout class="org.apache.log4j.PatternLayout"> | <param name="ConversionPattern" value="%d{ISO8601} %-5p [%c] %m%n"/> | </layout> | </appender> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3979263#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...