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From Igor Galić <i.ga...@brainsware.org>
Subject Re: [users@httpd] Failed downloads
Date Sat, 30 Oct 2010 18:47:31 GMT

----- "Nick Tzaperas" <nick@aquameta.com> wrote:

> Hi,
> 
> I've been investigating a problem with our proxy failing on large
> downloads.  We have an Apache proxy setup in a datacenter that
> forwards requests to another Apache server in another datacenter. 
> Any
> download initiated from a machine through the proxy or from the proxy
> server itself directly to the main Apache server will fail about half
> the time.  Any download initiated directly to the main server from
> anywhere that's not the proxy server will work every time.
> 
> I've taken tcpdumps on my client, on the proxy and on the server
> behind the proxy.  It seems that the server behind the proxy
> initiates
> a TCP RST which causes the download to fail.  When the download
> fails,
> it's usually very early on in the download.  Within a few seconds.

What is the backend?

> I have no idea why the main Apache server would send a RST.  I have
> the tcpdump files and apache config files available upon request. 
> The
> configs are pretty standard.  <Proxy> and ProxyPass.  For the main
> server, the files that are failing are PDFs being served through
> <Directory> and Alias.  Everything else is default KeepAlive,
> timeouts, etc.  I played with proxy-initial-not-pooled, but it didn't
> change anything.

Hi Nick,

Telling us that it's pretty default, and telling us that you have a
tcpdump doesn't really help *us* diagnose the problem ;)

So it would be really cool if you would post your configs and, if you can
your tcpdump. 

> I appreciate any guidance on this issue.
> 
> Cheers,
> Nick
> 
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-- 
Igor Galić

Tel: +43 (0) 664 886 22 883
Mail: i.galic@brainsware.org
URL: http://brainsware.org/

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