DeadlineExceededError in the mail API

Ian Lewis

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Sep 30, 2011, 12:18:36 AM9/30/11

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Hi,

I'm seeing a lot of errors in one of my applications when making
requests to the email RPC.

I am getting DeadlineExceededErrors being throw about half of the time
the api is called. The full error
is as follows.

...
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/mail.py",
line 390, in send_mail
message.send(make_sync_call)
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/mail.py",
line 891, in send
make_sync_call('mail', self._API_CALL, message, response)
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/apiproxy_stub_map.py",
line 94, in MakeSyncCall
return stubmap.MakeSyncCall(service, call, request, response)
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/apiproxy_stub_map.py",
line 308, in MakeSyncCall
rpc.CheckSuccess()
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/apiproxy_rpc.py",
line 133, in CheckSuccess
raise self.exception
DeadlineExceededError: The API call mail.Send() took too long to
respond and was cancelled.

Is anyone else seeing this?

--
Ian

http://www.ianlewis.org/

Dennis

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Sep 30, 2011, 1:02:20 AM9/30/11

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yes, i have been getting this error consistently for over 24 hours on my app.

i assumed it would be fixed by google quickly, but i guess not.

my app has not changed for weeks so it's something in the appengine infrastructure.

Rishi Arora

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Sep 30, 2011, 1:32:26 AM9/30/11

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Ditto. I'm noticing nearly 30% of all my mail send operations are failing. Fortunately, the last time this happened (a few weeks ago), I tucked in my mail send() calls in a taskqueue task. So, if it fails, the task queue automatically retries, in accordance with the back off algorithm parameters defined in queues.yaml. This has worked just fine, except that it introduces a little delay in the emails reaching their recipient. For my app, that is tolerable.

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