ashb commented on a change in pull request #4039: [AIRFLOW-3046] Fix ECS 
Operator mistakenly reports success
URL: https://github.com/apache/incubator-airflow/pull/4039#discussion_r224703994
 
 

 ##########
 File path: airflow/contrib/operators/ecs_operator.py
 ##########
 @@ -139,6 +140,15 @@ def _check_success_task(self):
             raise AirflowException(response)
 
         for task in response['tasks']:
+            # This is a `stoppedReason` that indicates a task has not
+            # successfully finished, but there is no other indication of 
failure
+            # in the response.
+            # See, 
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/stopped-task-errors.html
 # noqa E501
+            if re.match(r'Host EC2 \(instance .+?\) (stopped|terminated)\.',
 
 Review comment:
   Do we need this check? A look at the doc you linked to and it sounds like 
any of these other stoppedReasons would also be "we had to kill your task" type 
things and should be an error to?

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