Jannik Franz created AIRFLOW-4216:
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Summary: Sensors not rescheduled when root task with 'reschedule'
mode
Key: AIRFLOW-4216
URL: https://issues.apache.org/jira/browse/AIRFLOW-4216
Project: Apache Airflow
Issue Type: Bug
Reporter: Jannik Franz
When using Sensors and having them as root tasks (such as no prior dependency
task) and using mode 'reschedule' then the DAG state will be set to 'failed'
and tasks won't be rescheduled.
This is because the 'update_state' method for the DAG doesn't check for
'up_for_reschedule' in tasks properly:
[https://github.com/apache/airflow/blob/master/airflow/models/__init__.py#L4606]
The expected behaviour would be to reschedule the task without failing the DAG.
The workaround currently is adding a DummyOperator (or similiar) before the
Sensor.
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