code: def _do_not_run(self):
          
          # If I'm the master, ignore the command and raise a log
          if self.app.is_master:
              message = "Received message to not run. " \
                        "I am the Master arbiter, ignore and continue to run."
              logger.warning(message)
              return {'_status': u'ERR', '_message': message}
  
          # Else, I'm just a spare, so I listen to my master
          logger.debug("Received message to not run. I am the spare, stopping.")
          self.app.last_master_speak = time.time()
          self.app.must_run = False
          return {'_status': u'OK', '_message': message}
docs: The master arbiter tells to its spare arbiters to not run.
  
          A master arbiter will ignore this request and it will return an object
          containing some properties:
          '_status': 'ERR' because of the error
          `_message`: some more explanations about the error
  
          :return: None