Currently, if the configuration filename does not end in 'xml' or 'groovy', the logging system will fail to initialize.  However, when attempting to run Tomcat as a service on Windows the filename is passed to the ContextInitializer as a Windows short file name where the extension is upper case (e.g. file:/C:/openedge/wrk/OEPASS~1/conf/LOGGIN~3.XML).

The check for 'xml' or 'groovy' is not case insensitive, so the (valid) file name is rejected.