Customizing Debug Message Settings This section discusses how to change how log4s reports internal error and debug information.. It is generally a good idea to leave these values unchanged. If you set debugEnabled to false, log4s will write only critical error messages. (See EsPatternLayout>>pattern for an example of a debug message.) You can change the value of debugEnabled with this piece of code: EsLogLog debugEnabled: false If you set quietMode to true, log4s will be completely silent about any errors it encounters. You can change the value of debugEnabled with this piece of code: EsLogLog quietMode: true