1fanwang commented on PR #66788:
URL: https://github.com/apache/airflow/pull/66788#issuecomment-4771471396

   Thanks for the review, @ephraimbuddy. To be clear this wasn't noise — it 
came from a real duplicate-key red banner we hit on a multi-Dag-processor 
deployment. But when I stood up the actual two-processor race on `main` (real 
Postgres), the fix didn't hold up: the `IntegrityError` fires at the outer 
`update_dag_parsing_results_in_db` commit, not in the function this patches, 
and `run_with_db_retries` already retries it into a no-op. Closing as not 
needed.
   
   Your three points were all right — wrong layer, the mocked test didn't 
exercise the race, and the topology question is the real one. Raw traces in the 
description.
   


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