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Recover from StaleDataError during DagRun integrity verification to prevent scheduler crash.

Recover from StaleDataError during DagRun integrity verification to prevent scheduler crash.: a task in bird-critic-1.5-full-300 (Harbor dataset). When Airflow's LocalExecutor runs with high parallelism, a race condition can occur: a task instance row is completed or deleted between the time the…

The task

When Airflow's LocalExecutor runs with high parallelism, a race condition can occur: a task instance row is completed or deleted between the time the session loads task instances and the time `session.flush()` is called during task instance creation inside `DagRun.verify_integrity`. This raises…

Part of kochsnow/bird-critic-1.5-full-300.