ephraimbuddy opened a new pull request, #68558:
URL: https://github.com/apache/airflow/pull/68558
DBDagBag cached deserialized DAGs keyed only by dag_version_id, so after an
in-place version update (same id, new content for a version with no task
instances) the scheduler served stale code until restart. Cache the dag_hash
alongside each DAG and revalidate it against the database on every cache hit,
reloading when it no longer matches. The check is a single-row lookup on the
uniquely-indexed serialized_dag.dag_version_id column.
closes: #65696
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claude Opus 4.8
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