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From "Daniel Lamblin (JIRA)" <>
Subject [jira] [Commented] (AIRFLOW-363) Celery Queue becoming too huge when worker unavailable
Date Wed, 18 Apr 2018 09:14:00 GMT


Daniel Lamblin commented on AIRFLOW-363:

I'm not sure, but I think #3 was done, right [~criccomini]?

> Celery Queue becoming too huge when worker unavailable
> ------------------------------------------------------
>                 Key: AIRFLOW-363
>                 URL:
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: celery
>    Affects Versions: Airflow
>            Reporter: Vineet Goel
>            Priority: Major
> The scheduler currently queues executable tasks every run of the scheduler. I ran into
an issue where I was using a single worker and my dag was composed of a bunch of tasks that
could run simultaneously. I was setting a concurrency on the worker to control how many of
those tasks could run at the same time. However, my scheduler kept queueing more and more
tasks. This can cause a HUGE back pressure on the celery queue, which becomes unmanageable
at times. 
> We should set the
> configuration to handle this. 

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