On Fri, Nov 20, 2009 at 5:08 PM, Maxim Dounin <mdounin@mdounin.ru> wrote:

> Hello!
>
> On Fri, Nov 20, 2009 at 04:43:49PM -0800, kevin wrote:
>
> > i get this error on nginx log periodically:
> >
> >
> > 2009/11/20 16:37:15 [error] 65325#0: *100877 upstream prematurely closed
> > connection while reading response header from upstream, client:
> > 69.63.178.251, server: XX.com, request: "POST /ping HTTP/1.1", upstream:
> > "fastcgi://A.B.C.D8495", host: "X.Y.Z"
> >
> >
> > nginx version: nginx/0.8.27
> > built by gcc 4.4.1 20090725 (Red Hat 4.4.1-2) (GCC)
> > configure arguments: --prefix=/opt/local --with-http_stub_status_module
> > --with-http_geoip_module --with-http_realip_module
> >
> >
> > how to fix this problem?
> > thank you!
>
> Looks like your backend dies for some reason. You should fix
> backend.
>
maxim,
backend is not dead. they are still running.
the processes are alive.