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Asked: 2026-05-10T21:43:50+00:00

I am configure log4net to use a composite RollingFileAppender so that the current file

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I am configure log4net to use a composite RollingFileAppender so that the current file is always named logfile.log and all subsequent files are named logfile-YYYY.MM.dd.seq.log where seq is the sequence number if a log exceeds a certain size within a single day. Unfortunately, I have had very little success in configuring such a setup.

Edit:

My current configuration is pasted below. It has been updated based on several answers which gets me close enough for my needs. This generates files of the format: logfile_YYYY.MM.dd.log.seq

<log4net>      <root>         <level value='DEBUG' />         <appender-ref ref='RollingFileAppender' />     </root>      <appender name='RollingFileAppender' type='log4net.Appender.RollingFileAppender'>         <file value='logs\\logfile'/>         <staticLogFileName value='false'/>         <appendToFile value='true'/>         <rollingStyle value='Composite'/>         <datePattern value='_yyyy.MM.dd&quot;.log&quot;'/>         <maxSizeRollBackups value='10'/>         <maximumFileSize value='75KB'/>         <layout type='log4net.Layout.PatternLayout'>             <conversionPattern value='%date [%thread] %-5level %logger [%property{NDC}] - %message%newline'/>         </layout>         <filter type='log4net.Filter.LevelRangeFilter'>             <param name='LevelMin' value='DEBUG' />             <param name='LevelMax' value='FATAL' />         </filter>     </appender>  </log4net>

One interesting note, setting

<staticLogFileName value='false'/>

to true causes the logger to not write any files.

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1 Answer

  1. We use the following (in Log4J):

    <appender name='roller' class='org.apache.log4j.DailyRollingFileAppender'>     <param name='File' value='Applog.log'/>     <param name='DatePattern' value=''.'yyyy-MM-dd'/>     <layout class='org.apache.log4j.PatternLayout'>         <param name='ConversionPattern' value='[slf5s.start]%d{DATE}[slf5s.DATE]%n%p[slf5s.PRIORITY]%n%x[slf5s.NDC]%n%t[slf5s.THREAD]%n%c[slf5s.CATEGORY]%n%l[slf5s.LOCATION]%n%m[slf5s.MESSAGE]%n%n'/>     </layout> </appender>

    This gives us Applog.log.yyyy-MM-dd files

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