Dear sir, Yesterday night, i tried TimeBasedRollingPolicy class to logs the my code part. i used below configuration code in XML and after, used a single Thread to runs full night... When i see today morning, file created (myDebug.2009-04-02.zip) successfully. i extracted zip file after i verified yesterday log file. But, When see a current log file it keeps both logs (means yesterday and today logs). Actually this current log should contain today log only... i don't where am doing problem.... Please HELP me out... <appender name="FILEDEBUG" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>Debug/myDebug.log</file> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <FileNamePattern>myDebug.%d.zip</FileNamePattern> <MaxHistory>60</MaxHistory> </rollingPolicy> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>DEBUG</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> <layout class="ch.qos.logback.classic.PatternLayout"> <Pattern>%date %level [%thread] %logger{10} [%file:%line] %msg%n</Pattern> </layout> </appender> Thank you, boss134 -- View this message in context: http://www.nabble.com/Using-Thread-to-monitored-TimeBasedRollingPolicy...%21... Sent from the Logback Dev mailing list archive at Nabble.com.