saguziel commented on issue #7269: [AIRFLOW-6651] Add Redis Heartbeat option URL: https://github.com/apache/airflow/pull/7269#issuecomment-591116708 Celery does not support this type of thing, and it would not be portable across executors. Celery's consistency model is really simple, which is why it gets really messy with the task_acks_late arg and the fair scheduler and whatnot. I would say Celery is not designed to offer near-exactly-once type semantics which is why we have so many hacks on top of it.
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