OWIN interferes with log4net
In my application, I've got the following logging strategy/appenders: DebugAppender : If the root level is DEBUG, write every message that matches DEBUG to the default trace listener output ConsoleAppender : If the application mode (global context property) is 'console', write every message above WARN to the console ouput EventLogAppender : If the application mode (global context property) is 'service', write every message above ERRROR to the console output RollingFileAppender : Write every message above INFO to a rolling flat file This works very well throughout the whole application, until