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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2022/07/19 21:28:13 UTC

[GitHub] [airflow] RNHTTR commented on issue #23361: Scheduler crashes with psycopg2.errors.DeadlockDetected exception

RNHTTR commented on issue #23361:
URL: https://github.com/apache/airflow/issues/23361#issuecomment-1189568586

   I'm able to reliably force a DeadlockDetected exception by creating a DAG with many (i.e. over a hundred) concurrent tasks, setting `max_active_tasks_per_dag` to 75, setting `parallelism` to 100, triggering the DAG, waiting a couple minutes, then deleting the DAG Run. Maybe this is further evidence to @dstaple's proposed workaround limiting the lock to the `task_instance` table or at least a way to test if that workaround resolves this particular deadlock.


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