ashb commented on code in PR #49097:
URL: https://github.com/apache/airflow/pull/49097#discussion_r2044141669


##########
airflow-core/src/airflow/jobs/scheduler_job_runner.py:
##########
@@ -867,7 +921,14 @@ def process_executor_events(
 
                 # Get task from the Serialized DAG
                 try:
-                    dag = dag_bag.get_dag(ti.dag_id)
+                    dag = scheduler_dag_bag.get_dag(dag_run=ti.dag_run, 
session=session)
+                    cls.logger().error(
+                        "DAG '%s' for task instance %s not found in 
serialized_dag table",
+                        ti.dag_id,
+                        ti,
+                    )

Review Comment:
   And since we want this in Rc3, better to be safe rather than blow up the 
scheduler with an exception!



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