log4net rolling file appender configuration

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Hi
I am trying to configure the log4net rolling file appender, so it would create a new log every minute. Below is my configuration.

XML

<appender name="FileAppender" type="log4net.Appender.RollingFileAppender">
      <file type="log4net.Util.PatternString" value="Logs/Log_%date{dd.MM.yyyy-HH.mm}.log" />
      <appendToFile value="true" />
      <rollingStyle value="Date" />
      <maxSizeRollBackups value="6" />
      <datePattern value="yyyyMMdd-HHmm" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date{HH:mm:ss,fff}, %message%newline" />
      </layout>
    </appender>

With this configuration I get a new log every minute which is OK. The only problem is the name of the logs. The file name of the first log is as expected: Log_12.05.2013-01.43.log .
The problem is with the consecutive log files.
The next one is not named Log_12.05.2013-01.44.log as expected but
Log_12.05.2013-01.43.log20130512-0143

It seems I found a partial solution to my problem. The problem was with the "value" attribute of the file element, and the missing "preserveLogFileNameExtension" element.
Below is the updated configuration

XML

<appender name="FileAppender" type="log4net.Appender.RollingFileAppender">
      <file type="log4net.Util.PatternString" value="Logs/Log_.log" />
      <appendToFile value="true" />
      <rollingStyle value="Date" />
      <datePattern value="yyyyMMdd-HHmm" />
      <maxSizeRollBackups value="6" />
      <preserveLogFileNameExtension value="true"/>
      <staticLogFileName value="false" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date{HH:mm:ss,fff}, %message%newline" />
      </layout>
    </appender>

But with the new configuration there is another problem. It seems that the "maxSizeRollBackups" element has no effect - the log4net is not deleting the old logs.

Uroš

Posted 11-May-13 13:55pm

koleraba

Updated 11-May-13 14:32pm

v2

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Ehasanul Hoq · Answer 1 · 2015-03-29T23:25:00

You need to replace value of rollingStyle By Composite and to add maximumFileSize element and no need maxSizeRollBackup element.You may delete maxSizeRollBackup element.

the updated configuration is below

XML

<appender name="FileAppender" type="log4net.Appender.RollingFileAppender">
   <file type="log4net.Util.PatternString" value="Logs/Log_.log" />
   <appendToFile value="true" />
   <rollingStyle value="Composite" />
   <datePattern value="yyyyMMdd" />
   <maximumFileSize value="1KB" />
   <preserveLogFileNameExtension value="true"/>
   <staticLogFileName value="false" />
   <layout type="log4net.Layout.PatternLayout">
     <conversionPattern value="%date{HH:mm:ss,fff}, %message%newline" />
   </layout>
 </appender>

koleraba · Answer 2 · 2013-05-11T15:12:00

Solution 3

It seems that maxSizeRollBackups is not supported when rolling by date. For more information or if anybody needs that functionality follow this http://stackoverflow.com/questions/2290552/log4net-remove-old-files-rolling-by-date[^] link

Posted 11-May-13 15:12pm