zachliu commented on a change in pull request #18733:
URL: https://github.com/apache/airflow/pull/18733#discussion_r722668059



##########
File path: airflow/providers/amazon/aws/operators/ecs.py
##########
@@ -452,6 +460,11 @@ def _check_success_task(self) -> None:
         if len(response.get('failures', [])) > 0:
             raise AirflowException(response)
 
+        if self.task_log_fetcher and not 
self.task_log_fetcher.is_log_stream_created():
+            raise AirflowException(
+                'Cloudwatch log stream for the task is not found. The task 
probably failed to start.'
+            )
+
         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

Review comment:
       :+1: 




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