fix(fcm): A workaround for the concurrency issues in googleapiclient #558
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lahirumaramba
approved these changes
Jun 25, 2021
| @@ -373,10 +373,11 @@ def batch_callback(_, response, error): | |||
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| batch = http.BatchHttpRequest( | |||
| callback=batch_callback, batch_uri=_MessagingService.FCM_BATCH_URL) | |||
| transport = self._build_transport(self._credential) | |||
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Is the reason to use _build_trasnport here (instead of directly using _auth.authorized_http) so we can write tests easily?
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This is a possible solution to the problem outlined in #507. I wasn't quite able to repro the exception in the bug report, but the threading issues in
googleapiclientare well known, and I can easily reproduce some concurrency issues by callingsend_all()from just 3-4 parallel threads. The proposed solution is to instantiate a new transport instance for each invocation ofsend_all()(as opposed to using a shared transport across calls), and tests indeed confirm that it resolves the issues I managed to reproduce.