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Subject [GitHub] [airflow] sarutak commented on a change in pull request #7128: [AIRFLOW-6529] Serialization error occurs when the scheduler tries to run on macOS.
Date Fri, 10 Jan 2020 14:00:20 GMT
sarutak commented on a change in pull request #7128: [AIRFLOW-6529] Serialization error occurs
when the scheduler tries to run on macOS.
URL: https://github.com/apache/airflow/pull/7128#discussion_r365246048
 
 

 ##########
 File path: tests/test_utils/mock_executor.py
 ##########
 @@ -36,10 +36,17 @@ def __init__(self, do_update=True, *args, **kwargs):
         self.history = []
         # All the tasks, in a stable sort order
         self.sorted_tasks = []
-        self.mock_task_results = defaultdict(lambda: State.SUCCESS)
+
+        # If multiprocessing runs in spawn mode,
+        # arguments are to be pickled but lambda is not picclable.
+        # So we should pass self.success instead of lambda.
+        self.mock_task_results = defaultdict(self.success)
 
         super().__init__(*args, **kwargs)
 
+    def success(self):
+        return State.SUCCESS
 
 Review comment:
   [Here](https://github.com/apache/airflow/pull/7128/files#diff-d7e6d11bfaeca087149ad577dd7704daR43)

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