On Wed, Oct 9, 2013 at 2:55 AM, Luis <[email protected]> wrote:

> Basically we have a cron job which identifies certain heavy activities that 
> need to be executed. The cron job sends these activities as tasks to a queue 
> as a mean to have them executed in an ordered way in a dynamic backend.
>
>
> The problem is that sometimes the tasks are never executed and the backend 
> gets stuck or zombie. In the backend logs we see no evidence at all of the 
> tasks (the actual request doesn't get recorded), even though according to the 
> tasks queues console there should some of them running.
>
>
It's odd that you're not seeing any error logs from the tasks. Are you sure
you're seeing all the logs? If you download your logs, do you see any error
logs pertaining to the backends there?

Can you try moving the task queues to send requests to a front end instance
and see if that works? What settings is each task configured with (for
instance, the *retryoptions*)?


On Wed, Oct 9, 2013 at 2:55 AM, Luis <[email protected]> wrote:

> We are on Java and M/S. Have you ever faced something similar? Any ideas or 
> suggestions to get rid of this issue?
>
>

Try to migrate off M/S to the HRD datastore:
https://developers.google.com/appengine/docs/adminconsole/migration

M/S occasionally has weird, difficult-to-trace errors.



-----------------
-Vinny P
Technology & Media Advisor
Chicago, IL

App Engine Code Samples: http://www.learntogoogleit.com

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