[jira] [Commented] (AIRFLOW-3726) Change the description and the default value for broker_url in airflow.cfg

["Ash Berlin-Taylor (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AIRFLOW-3726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16746532#comment-16746532 ] 

Ash Berlin-Taylor commented on AIRFLOW-3726:
--------------------------------------------

4.1 added support for it back https://github.com/celery/kombu/blob/master/Changelog#L138, so perhaps we just need to increase the minimum version requirement on Celery.

> Change the description and the default value for broker_url in airflow.cfg
> --------------------------------------------------------------------------
>
>                 Key: AIRFLOW-3726
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-3726
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: configuration
>            Reporter: Kengo Seki
>            Priority: Major
>
> Celery seems to have dropped SQLAlchemy support for its broker from 4.0.0 (introduced at Airflow 1.9.0).
> http://docs.celeryproject.org/en/4.0/whatsnew-4.0.html#features-removed-for-lack-of-funding
> But the default airflow.cfg can be read as it's still supported.
> {code:title=airflow/config_templates/default_airflow.cfg}
> # The Celery broker URL. Celery supports RabbitMQ, Redis and experimentally
> # a sqlalchemy database. Refer to the Celery documentation for more
> # information.
> broker_url = sqla+mysql://airflow:airflow@localhost:3306/airflow
> {code}



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