FYI, the corresponding production issue is there:
http://code.google.com/p/googleappengine/issues/detail?id=5499

Bottom line is that we recently experienced a lot of transient issues
in the lower of the datastore that only affected M/S applications.

Migrating to HRD wil prevent applications to be affected by these
temporary failures

I encourage you to review this blog post and this group thread, that
discuss HRD migration gotchas deeper:
http://blog.shnap.com/migrating-to-the-google-app-engine-high-repli
https://groups.google.com/d/topic/google-appengine/STpxPUwLhAk/discussion

We will soon provide automated tool to migration to HRD, but if you
can't wait please open a new production ticket so we can assist you to
migration your application manually.

Hope that helps.

On Thu, Aug 4, 2011 at 5:14 PM, Alexis <[email protected]> wrote:
> We currently experience an outage longer than previous ones... (about
> 30min this time)
>
> Which is an opportunity to study logs with more detail (as I can get
> the debug, info levels of recent requests).
>
> I've noticed that while the global latency is high, requests that do
> not write on datastore are successful while the ones that perform some
> writes raises the hard DeadlineExceeded error.
>
>
> On 3 août, 21:47, Will Reiher <[email protected]> wrote:
>> To further my original comment... While it seems to be back to an almost
>> normal state when it was really bad I was getting DeadlineExceeded errors on
>> Warm ups and other otherwise trivial requests. Most of my issues were not
>> related to any offline task work - in fact for the most part tasks seemed to
>> be the most stable.
>>
>> As I said originally this included deployments that had been stable for 30+
>> days and were all of a sudden throwing way more Deadline exceptions.
>
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-- 
Johan Euphrosine (proppy)
Developer Programs Engineer
Google Developer Relations

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