How log4net does not clear the log every time XmlConfigurator.Configure () is called in the process

Question

In my application, I include 3 libraries:

Log4net Common.Logging.log4net Quartz (use Common.Logging.log4net to write logs) 

This is my log4net partition configuration:

 <log4net> <root> <level value="ALL" /> <appender-ref ref="FileAppender" /> </root> <appender name="FileAppender" type="log4net.Appender.FileAppender"> <file value="quartz.log" /> <appendToFile value="false" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %level %logger - %message%newline" /> </layout> </appender> </log4net> 

Everything is fine, but the problem is with XmlConfigurator.Configure (). This command is called 2 times in order:

• Called when the application starts → I am recording a log.
• Called when quartz starts. (I checked when to read the source code for Common.Logging.log4net) → Quartz logging.

After the start of quartz, my logs were cleared due to XmlConfigurator.Configure (). This means that when this command is called, the log will be cleared. I do not want my log to be cleared after this command with a name in the process .

I can get the source dll Common.Logging.log4net to modify the code to check if log4net is really configured and call XmlConfigurator.Configure () if not. But I do not like it.

Please help me find another solution without changes in the DLL.

Additional information: http://neilkilbride.blogspot.com/2008/04/configure-log4net-only-once.html

Answer 1

You configured that the prefix file creates a new log file when reconfiguring log4net:

  <appendToFile value="false" /> 

Change this to:

  <appendToFile value="true" /> 

Log messages will be added at the end of the file, even if you call XmlConfigurator.Configure() several times.