old_contents: from gunicorn.workers.base import Worker
  from meinheld import server
  import os
  
  class MeinheldWorker(Worker):
      
      def watchdog(self):
          self.notify()
  
          if self.ppid != os.getppid():
              self.log.info("Parent changed, shutting down: %s" % self)
              server.stop()
  
      def run(self):
          fd = self.socket.fileno()
          server.set_watchdog(self.watchdog)
          server.set_listen_socket(fd)
          server.run(self.wsgi)
  
      def handle_quit(self, sig, frame):
          server.stop()
  
      def handle_exit(self, sig, frame):
          server.stop()
          sys.exit(0)
  
  
new_contents: from gunicorn.workers.base import Worker
  from meinheld import server
  import os
  
  class MeinheldWorker(Worker):
      
      def watchdog(self):
          self.notify()
  
          if self.ppid != os.getppid():
              self.log.info("Parent changed, shutting down: %s" % self)
              server.stop()
  
      def run(self):
          fd = self.socket.fileno()
          server.set_keepalive(self.cfg.keepalive)
          server.set_picoev_max_fd(self.cfg.worker_connections)
          server.set_watchdog(self.watchdog)
          server.set_listen_socket(fd)
          server.run(self.wsgi)
  
      def handle_quit(self, sig, frame):
          server.stop()
  
      def handle_exit(self, sig, frame):
          server.stop()
          sys.exit(0)
  
  
subject: set gunicorn's config parameter