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From <eric.b...@barclayscapital.com>
Subject Logs show reasonable request handling duration, but proxied clients timing out
Date Tue, 05 Jan 2010 16:39:06 GMT
For sometime I've had complaints from one of the users of a particular
mod_perl handler that is timing out on their end.  They are using a
programmatic Java client, accessing a mod_perl registry handler that
simply returns a text file.

 

The client is accessing my servers via a proxy which then connects to a
load balancer that balances between two of my boxes.

 

The client uses a 500 millisecond read timeout which is often reached,
causing the client process to throw exceptions.  However, when I look at
my logs, the %D param shows durations well below this limit.

 

At times I do not see the requests at all.

 

What should I be looking at on my servers to see if the problem is on my
end?

 

As much as it appears that the problem is in the proxies, I want to make
sure that I've covered all the bases from my end before I escalate the
issue.

 

There are no fixup handlers or log handlers, which I believe might
impact post-logging timings.

 

Thanks, everybody.

 

Eric


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