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From: [email protected]
[mailto:[email protected]] On Behalf Of Skirmantas Jurgaitis
Sent: Sunday, January 29, 2012 2:10 PM
To: [email protected]
Subject: [google-appengine] disruption for a couple of hours, have no idea
what was the problem
 
Today my app had a serious problems for a couple of hours. I am trying to
understand what went wrong and how to prevent this in future. I think this
was a problem of appengine and memcache service was not responding for a
while. I am making a conclusion like this because in logs I find a big
number of requests which died like this:
<...> 
File
"/base/python_runtime/python_lib/versions/1/google/appengine/api/memcache/__
init__.py", line 619, in __get_hook
rpc.check_success()
<...>
File
"/base/python_runtime/python_lib/versions/1/google/appengine/api/apiproxy_rp
c.py", line 119, in Wait
rpc_completed = self._WaitImpl()
File
"/base/python_runtime/python_lib/versions/1/google/appengine/runtime/apiprox
y.py", line 131, in _WaitImpl
rpc_completed = _apphosting_runtime___python__apiproxy.Wait(self)
DeadlineExceededError
 
However http://code.google.com/status/appengine
<http://code.google.com/status/appengine/detail/memcache/2012/01/29#ae-trust
-detail-memcache-get-latency>  does not show any problems. So I am not sure.
Here is todays graph with milliseconds/request:
 
 
<https://lh4.googleusercontent.com/-q9PdPRkd_e0/TyW94risJeI/AAAAAAAAAA8/vJSe
aBgCawk/s1600/disruption.png> Description: Image removed by sender.
If this was a problem of appengine how can I prove that and how can I get a
refund for resources wasted by many instances which where started during
these hours?
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