Hi,

The "survival" of content of memcache is not garanteed by the specs of
GAE: it can disappear at any time.
Those specs say: "However, when considering whether to store a value
solely in the memcache and not backed by other persistent storage, be
sure that your application behaves acceptably when the value is
suddenly not available. Values can expire from the memcache at any
time, and may be expired prior to the expiration deadline set for the
value." see 
http://code.google.com/appengine/docs/java/memcache/overview.html#When_to_Use_a_Memory_Cache

Consequently, it can disappear when no instance is present. As such,
it's a "feature".

So, your apps should be ready to recreate it at any time.

regards

didier


On Sep 10, 5:04 am, Bendanpa <[email protected]> wrote:
> Hi,
>
> I got a issue with my app. I load a object into memcache. If i keep at least
> one instance alive then the memcache stay ok. I also noticed when all
> instances are killed then the memcache is also gone. Can someone confirm my
> observation.
>
> Hi Googlers, is this a bug or feature?
>
> Thanks,
> Bendanpa

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