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Row lock TI query in SchedulerJob._process_executor_events #18975

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Oct 14, 2021
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Row lock TI query in SchedulerJob._process_executor_events #18975

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38747ee
Row lock TI query in SchedulerJob._process_executor_events
ephraimbuddy Oct 14, 2021
e0d34dd
Update airflow/jobs/scheduler_job.py
ephraimbuddy Oct 14, 2021
320f267
fixup! Update airflow/jobs/scheduler_job.py
ephraimbuddy Oct 14, 2021
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10 changes: 9 additions & 1 deletion airflow/jobs/scheduler_job.py
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Original file line number Diff line number Diff line change
Expand Up @@ -510,7 +510,15 @@ def _process_executor_events(self, session: Session = None) -> int:

# Check state of finished tasks
filter_for_tis = TI.filter_for_tis(tis_with_right_state)
tis: List[TI] = session.query(TI).filter(filter_for_tis).options(selectinload('dag_model')).all()
query = session.query(TI).filter(filter_for_tis).options(selectinload('dag_model'))
# row lock this entire set of tasks to make sure the scheduler doesn't fail when we have
# multi-schedulers
tis: List[TI] = with_row_locks(
query,
of=TI,
session=session,
**skip_locked(session=session),
).all()
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for ti in tis:
try_number = ti_primary_key_to_try_number_map[ti.key.primary]
buffer_key = ti.key.with_try_number(try_number)
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