I have a task in Airflow 2.1.2 which is finishing with success status, but after that log shows a sigterm:
[2021-12-07 06:11:45,031] {python.py:151} INFO - Done. Returned value was: None
[2021-12-07 06:11:45,224] {taskinstance.py:1204} INFO - Marking task as SUCCESS. dag_id=DAG_ID, task_id=TASK_ID, execution_date=20211207T050000, start_date=20211207T061119, end_date=20211207T061145
[2021-12-07 06:11:45,308] {local_task_job.py:197} WARNING - State of this instance has been externally set to success. Terminating instance.
[2021-12-07 06:11:45,309] {taskinstance.py:1265} INFO - 0 downstream tasks scheduled from follow-on schedule check
[2021-12-07 06:11:45,310] {process_utils.py:100} INFO - Sending Signals.SIGTERM to GPID 6666
[2021-12-07 06:11:45,310] {taskinstance.py:1284} ERROR - Received SIGTERM. Terminating subprocesses.
[2021-12-07 06:11:45,362] {process_utils.py:66} INFO - Process psutil.Process(pid=6666, status='terminated', exitcode=1, started='06:11:19') (6666) terminated with exit code 1
As you can see the first row returns Done, and the previous rows of this log showed that all script worked fine and data has been inserted in the Datawarehouse.
In the line number 8 it shows SIGTERM due some external trigger mark it as success but I am sure that nobody used the API, or CLI to mark it as success neither the UI.
Any idea how to avoid it and why could this be happening?
I don't know if maybe increasing the AIRFLOW_CORE_KILLED_TASK_CLEANUP_TIME could fix it, but I would like to understand it.
