code: def limit_chord_unlock_tasks(app):
      
      task = app.tasks['celery.chord_unlock']
      if task.max_retries is None:
          retries = getattr(app.conf, 'CHORD_UNLOCK_MAX_RETRIES', None)
          task.max_retries = retries
docs: Set max_retries for chord.unlock tasks to avoid infinitely looping
      tasks. (see celery/celery#1700 or celery/celery#2725)