Kengo Seki created AIRFLOW-3726:
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Summary: 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
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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