uranusjr commented on code in PR #30255:
URL: https://github.com/apache/airflow/pull/30255#discussion_r1159369070


##########
airflow/dag_processing/manager.py:
##########
@@ -576,8 +585,8 @@ def _run_parsing_loop(self):
         while True:
             loop_start_time = time.monotonic()
             ready = multiprocessing.connection.wait(self.waitables.keys(), 
timeout=poll_time)
-            if self._job:
-                self._job.heartbeat()
+            if hasattr(self._job_runner, "job") and self._job_runner.job is 
not None:

Review Comment:
   ```suggestion
               if getattr(self._job_runner, "job", None) is not None:
   ```
   
   What’s the difference between `self._job_runner` not having the `job` 
attribute, and the attribute being None though? It seems to me the attribute 
can always be there and default to None.



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