Sessions are also stored in memcache so you would also need to clear that.

BTW, I catch all exceptions thrown from my cache and simply return null. After all, the cache is not intended to be a permanent store so your code needs to handle this case anyway.

On 16 Apr 2010, at 23:38, Esteban Ignacio Masoero wrote:

Thomas, thanks for the response. I tried deleting all entries for _ah_SESSION, but it didn't work. Can anyone from Google clarify whether this should or shouldn't work? I'll try what you said about the web.xml, if it's possible it should be much better.

Thanks,

Esteban

On Thu, Apr 15, 2010 at 9:38 PM, Thomas <mylee...@gmail.com> wrote:
On 4月16日, 上午3時36分, Esteban Ignacio Masoero <emaso...@getsense.com.ar>
wrote:
> - Is there a way I can programatically (or from the admin console would be
> best) make all session cookies expire?

   You can remove all entries (each represents a user session) in th
_ah_SESSION kind with Datastore Viewer of Admin console.

> - Would it be possible to make this exception "cacheable" by the app, so we
> can at least show some proper message?

   Try to setup error page for java.io.InvalidClassException in
web.xml. I am not sure if it works but it's worthy to try.

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