awdavidson commented on code in PR #37541:
URL: https://github.com/apache/airflow/pull/37541#discussion_r1497904760
##########
airflow/jobs/job.py:
##########
@@ -183,30 +184,32 @@ def heartbeat(
previous_heartbeat = self.latest_heartbeat
try:
- # This will cause it to load from the db
- self._merge_from(Job._fetch_from_db(self, session))
- previous_heartbeat = self.latest_heartbeat
-
- if self.state == JobState.RESTARTING:
- self.kill()
-
- # Figure out how long to sleep for
- sleep_for = 0
- if self.latest_heartbeat:
- seconds_remaining = (
- self.heartrate - (timezone.utcnow() -
self.latest_heartbeat).total_seconds()
- )
- sleep_for = max(0, seconds_remaining)
- sleep(sleep_for)
-
- job = Job._update_heartbeat(job=self, session=session)
- self._merge_from(job)
-
- # At this point, the DB has updated.
- previous_heartbeat = self.latest_heartbeat
-
- heartbeat_callback(session)
- self.log.debug("[heartbeat]")
+ for attempt in run_with_db_retries(logger=self.log):
+ with attempt:
+ # This will cause it to load from the db
+ self._merge_from(Job._fetch_from_db(self, session))
+ previous_heartbeat = self.latest_heartbeat
+
+ if self.state == JobState.RESTARTING:
+ self.kill()
+
+ # Figure out how long to sleep for
+ sleep_for = 0
+ if self.latest_heartbeat:
+ seconds_remaining = (
+ self.heartrate - (timezone.utcnow() -
self.latest_heartbeat).total_seconds()
+ )
+ sleep_for = max(0, seconds_remaining)
+ sleep(sleep_for)
+
+ job = Job._update_heartbeat(job=self, session=session)
+ self._merge_from(job)
+
+ # At this point, the DB has updated.
+ previous_heartbeat = self.latest_heartbeat
+
+ heartbeat_callback(session)
+ self.log.debug("[heartbeat]")
except OperationalError:
Review Comment:
Yes the heartbeat failure due to transient issue is not a direct cause but
we have seen the heartbeat failure lead to the job being killed immediately
after even though the user logic of the job was running without issue
I think the retry within the heartbeat adds additional tolerance and
prevents situations where `is_alive` returns `False` due to transient db errors
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