RNHTTR commented on a change in pull request #14883:
URL: https://github.com/apache/airflow/pull/14883#discussion_r601996629



##########
File path: airflow/executors/celery_executor.py
##########
@@ -547,11 +547,12 @@ def get_many(self, async_results) -> Mapping[str, 
EventBufferValueType]:
         """Gets status for many Celery tasks using the best method 
available."""
         if isinstance(app.backend, BaseKeyValueStoreBackend):
             result = self._get_many_from_kv_backend(async_results)
-            return result
-        if isinstance(app.backend, DatabaseBackend):
+        elif isinstance(app.backend, DatabaseBackend):
             result = self._get_many_from_db_backend(async_results)
-            return result
-        result = self._get_many_using_multiprocessing(async_results)
+        else:
+            async_results = list(async_results)
+            result = self._get_many_using_multiprocessing(async_results)
+        async_results = list(async_results) if isinstance(async_results, map) 
else async_results

Review comment:
       ~@kaxil Looks like the failed build is due to a bug that was corrected 
yesterday #14986~ actually i just re-rebased and pushed again.




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