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From Glenn McClements <>
Subject Re: Airflow issue
Date Fri, 10 Feb 2017 16:14:17 GMT
Yep, hit the same issue myself when I upgraded to Ubuntu 16.

There were previous mails about this but can’t actually find them. The errors I were getting
were non-intuitive so it’s good to make other folks aware.

SVP Engineering, Europe

Adelaide Exchange Building, 2nd Floor, 24-26 Adelaide Street, Belfast, BT2 8GD | @vela_tt

On 10/02/2017, 06:43, "Franck Coiffier" <> wrote:


    I'm writing to you because I had an issue with Airflow (

    I was using Celery with RabbitMQ and because of the requirements 'celery>=3.1.17',
the Celery version 4.0.2 was installed in my case.

    I was capable of publishing tasks in the queue but when the worker read them, it output
: "[WARNING/MainProcess] Received and deleted unknown message.  Wrong destination?!?" (like
this :

    After a bit more research, I found that Celery > 4.0 might be incompatible with librabbitmq
(I am using 1.6.1) :

    So I uninstall Celery and reinstall it with 'celery>=3.1.17,<4.0' and now it's working
like a charm.

    I don't know if you will be able to reproduce the problem but I wanted to share the info
with you.

    Best regards,


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