On Tue, Jan 29, 2013 at 6:25 AM, <[email protected]> wrote:

> Hello,****
>
> ** **
>
> I’ve got an issue with mod_proxy, on eavy load, I have a lot of HTTP 503
> response.****
>
> ** **
>
> When looking in detail on requests, we can see that mod_proxy don’t close
> properly the request (it waits for the next request to send FIN-HACK to the
> backend).
>

mod_proxy doesn't normally close the backend connection immediately after
using it.  Instead, the connection will be closed when processing a
subsequent request and it is then determined that the connection can't be
reused.  This behavior is expected and rarely (if ever) the *root* cause of
operational problems, though there are some circumstances where turning off
backend connection reuse is appropriate.

Is the backend server returning 503s because a lot of connections from the
proxy are in keep-alive state?  If so, maybe you should lower keepalive
timeouts for the backend connection.




****
>
> ** **
>
> ****
>
> ** **
>
> I’ve found that a similar issue have already been reported :****
>
> https://issues.apache.org/bugzilla/show_bug.cgi?id=50807****
>
> ** **
>
> Is there any correction on the mod_proxy regarding this problem, would it
> appears again using apache 2.4 ?****
>
> ** **
>
> Thanks in advance for replies.****
>
> ** **
>
> ** **
>
> Sébastien ****
>
> ** **
>
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