thanks @Maxim, our upstream server is apache and there are not any
suspicious error_logs in apache. We're getting one reset error every 3
hours. Is there any clue to find the root cause of apache problem ?

I know its nginx forum, sorry for off-topic.

On Mon, Jun 2, 2014 at 7:52 PM, Maxim Dounin <mdounin@mdounin.ru> wrote:

> Hello!
>
> On Mon, Jun 02, 2014 at 02:04:45PM +0500, shahzaib shahzaib wrote:
>
> > Hello,
> >
> > We're using nginx as reverse proxy in front of apache and
> > following error occurs most of the time :
> >
> > 2014/06/02 01:00:28 [error] 3288#0: *6492138 recv() failed (104:
> Connection
> > reset by peer) while reading response header from upstream, client:
> > 141.0.10.83, server: domain.com, request: "GET /rss/recent HTTP/1.1",
> > upstream: "http://127.0.0.1:7172/rss/recent", host: "domain.com"
>
> [...]
>
> Your upstream server isn't working properly, and resets
> connections. There is more or less nothing to do on nginx side,
> try looking into the upstream server instead.
>
> --
> Maxim Dounin
> http://nginx.org/
>
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