On Apr 10, 3:15 pm, "John Mettraux" <[EMAIL PROTECTED]> wrote:
> Hello Maarten,
>
> I couldn't reproduce the problem for now. Do you have more information ?
>

Hi John,

Thanks for for your replies. For days I am looking for a pattern in
the reported errors, but it all seems very undeterministic. What also
makes it difficult is that my log files have gaps in them, as if the
ruby logger or the file system (which is NFS) is unreliable. I use the
Densha admin pages in my application to monitor the processes, but
they didn't show any errors recently.

>From the user perspective, it looks as if the process sometimes hangs,
and sometimes it continues with the wrong expression. From a developer
perspective, it seems as if the database is sometimes failing without
notice or mixing things up. My process is full of loops, timeouts and
breaks, but two weeks ago it all seemed to work flawlessly.

The nature of the problems also made me think about low level problems
with concurrency (threading) or caching. However we are still testing
with one or two active process at a time. I use OpenWFE 0.9.17 with
Rails 1.2.6 and MySQL 5 on production. I think the production system
runs two mongrel instances. I use the CachedDbPersistedEngine and a
custom participant based on ActiveStoreParticipant.

This weekend I have more time to look at the logs that the testers
produced today.

Thanks,

Maarten

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