def disable
      jlogger.setLevel(level_off)
      JLogger.getLogger('org').setLevel(level_off)
      JLogger.getLogger('akka').setLevel(level_off)
      JLogger.getRootLogger.setLevel(level_off)
    end
def disable
      jlogger.setLevel(level_off)
      JLogger.getLogger('org').setLevel(level_off)
      JLogger.getLogger('akka').setLevel(level_off)
      JLogger.getRootLogger.setLevel(level_off)
    end
Disable all Spark log