ashb commented on a change in pull request #6553: [AIRFLOW-5902] avoid 
unnecessary sleep to maintain local task job heart rate
URL: https://github.com/apache/airflow/pull/6553#discussion_r349699789
 
 

 ##########
 File path: airflow/jobs/base_job.py
 ##########
 @@ -171,17 +171,14 @@ def heartbeat(self):
             if self.state == State.SHUTDOWN:
                 self.kill()
 
-            is_unit_test = conf.getboolean('core', 'unit_test_mode')
 
 Review comment:
   > I am thinking of patching sleep globally for all unit tests, so we won't 
have to worry about it going forward. is this the kind of change you all 
comfortable with?
   
   No, sometimes we _need_ sleep in our tests to give a sub-process time to do 
start up etc.(mostly tests, not in the airflow core), or in the dags to "do 
nothing for a long time" so this would break all sorts of things.

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