old_contents: 
  # Wait up to 15 minutes for each iteration.
  BROKER_TRANSPORT_OPTIONS = {'visibility_timeout': 3600} # Seconds = 1 hour.
  # Do not pre-fetch work.
  CELERYD_PREFETCH_MULTIPLIER = 1 
  # Do not ack messages until work is completed.
  CELERY_ACKS_LATE = True
  # Stop warning me about PICKLE.
  CELERY_ACCEPT_CONTENT = ['pickle']
  
  
new_contents: 
  # Wait up to 15 minutes for each iteration.
  BROKER_TRANSPORT_OPTIONS = {'visibility_timeout': 60*60} # 60*60 Seconds = 1 hour.
  # Do not pre-fetch work.
  CELERYD_PREFETCH_MULTIPLIER = 1 
  # Do not ack messages until work is completed.
  CELERY_ACKS_LATE = True
  # Stop warning me about PICKLE.
  CELERY_ACCEPT_CONTENT = ['pickle']
  # Clear out finished results after 30 minutes.
  CELERY_TASK_RESULT_EXPIRES = 60*30
  
subject: Reduce result broker message timeout