potiuk commented on code in PR #27720:
URL: https://github.com/apache/airflow/pull/27720#discussion_r1032703935
##########
airflow/jobs/scheduler_job.py:
##########
@@ -1307,20 +1309,27 @@ def _schedule_dag_run(
return callback_to_run
- def _verify_integrity_if_dag_changed(self, dag_run: DagRun, session:
Session) -> None:
- """Only run DagRun.verify integrity if Serialized DAG has changed
since it is slow"""
+ def _verify_integrity_if_dag_changed(self, dag_run: DagRun, session:
Session) -> bool:
+ """
+ Only run DagRun.verify integrity if Serialized DAG has changed since
it is slow.
+
+ Return True if we determine that DAG still exists.
+ """
latest_version =
SerializedDagModel.get_latest_version_hash(dag_run.dag_id, session=session)
if dag_run.dag_hash == latest_version:
self.log.debug("DAG %s not changed structure, skipping
dagrun.verify_integrity", dag_run.dag_id)
- return
+ return True
dag_run.dag_hash = latest_version
# Refresh the DAG
dag_run.dag = self.dagbag.get_dag(dag_id=dag_run.dag_id,
session=session)
+ if not dag_run.dag:
+ return False
Review Comment:
I think it's pretty goot to be like it is. Exceptions are fine, but
sometimes True/False is fine - especially if the method is named as "verify..".
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