ashb commented on a change in pull request #20349:
URL: https://github.com/apache/airflow/pull/20349#discussion_r770949995
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File path: airflow/jobs/scheduler_job.py
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@@ -402,6 +402,14 @@ def _executable_task_instances_to_queued(self, max_tis:
int, session: Session =
# Many dags don't have a task_concurrency, so where we can
avoid loading the full
# serialized DAG the better.
serialized_dag = self.dagbag.get_dag(dag_id,
session=session)
+ # If the dag is missing, continue to the next task.
+ if not serialized_dag:
+ self.log.error(
+ "DAG '%s' for taskinstance %s not found in
serialized_dag table",
+ dag_id,
+ task_instance,
+ )
+ continue
Review comment:
If we can't find them, shouldn't these be set to failed or something,
otherwise these TIs will always come up each time around the loop
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