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Updating Airflow

This file documents any backwards-incompatible changes in Airflow and assists people when migrating to a new version.

Airflow 1.8

Changes to Behavior

New DAGs are paused by default

Previously, new DAGs would be scheduled immediately. To retain the old behavior, add this to airflow.cfg:

[core]
dags_are_paused_at_creation = False

Worker, Scheduler, Webserver, Kerberos, Flower now detach by default

The different daemons have been reworked to behave like traditional Unix daemons. This allows you to set PID file locations, log file locations including stdin and stderr.

If you want to retain the old behavior specify -f or --foreground on the command line.

Deprecated Features

These features are marked for deprecation. They may still work (and raise a DeprecationWarning), but are no longer supported and will be removed entirely in Airflow 2.0

Operators no longer accept arbitrary arguments

Previously, Operator.__init__() accepted any arguments (either positional *args or keyword **kwargs) without complaint. Now, invalid arguments will be rejected.