How to mark an Airflow DAG run as failed if any task fails?

Question

Is it possible to make an Airflow DAG fail if any task fails?

I usually have some cleaning up tasks at the end of a DAG and as it is now, whenever the last task succeeds

Answer 1

Facing a similar problem. It is not a bug but it could be a nice feature to add this property to Dag.

As a workaround, I you can push a XCOM variable during the task that is allowed to fail and in the downstream tasks do something like

if ti.xcom_pull(key='state', task_ids=task_allowed_to_fail_id) == 'FAILED': raise ValueError('Force failure because upstream task has failed')