Fix DetachedInstanceError in OpenLineage listener when accessing DagRun note#65579
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mobuchowski merged 1 commit intoapache:mainfrom Apr 22, 2026
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This PR resolves a high priority regression where the OpenLineage listener crashes with a DetachedInstanceError during on_dag_run_success or on_dag_run_failed events.
The Problem: In Airflow 3.2+ the DagRun model added a note association proxy the OpenLineage DagRunInfo class attempts to access this attribute during event serialization. Since the listener often processes DagRun instances that are detached from a SQLAlchemy session this access triggers a lazy-load that fails and crashes the listener, blocking system tests (e.g., BigQuery).
The Fix: Introduced a safe_getattr utility in the OpenLineage provider that catches DetachedInstanceError and returns None as a fallback. Applied this to both note and deadlines fields in DagRunInfo to ensure the listener remains stable even when working with detached objects.
closes: #65577
Was generative AI tooling used to co-author this PR?
Yes — Claude(For pr description)