scheduler exited when the end_date is coming: TypeError: unsupported operand type(s) for +: 'NoneType' and 'datetime.timedelta

[AsusClass]

Why the schedulers exited in the last minute which the end_date was coming?

airflow with 3 schedulers and 6 workers

DAGs

50 DAGs (10 Tasks for every DAG)

airflow.cfg

scheduler plan: run every minute from 19:00~19:30(CST)

note: the time in DAGFile Proccessor is CST but the scheduler is UTC

Error in the last minute from one of schedulers (all the same)

there should be 500(50*10) succeed tasks in the last minute, but a few not procced and scheduler dead.

[sss12m7]

啧啧啧("▔□▔)/("▔□▔)/("▔□▔)/

[AsusClass]

Maybe soloved in airflow 2.2.2 and i am verifing:
#19307

[AsusClass]

This is a bug of airflow and was soloved in airflow 2.2.2.

[18ksquare24]

we are getting this error airflow 2.10.1 version, and it is occurring during dags parsing time, we have around 5000 dags