upstream sent invalid status "-1 Copy failed" while reading response header from upstream

[Maxim Dounin]

Hello!

On Mon, Oct 27, 2014 at 04:44:25PM -0400, NaZz wrote:

> Where should I dig exactly? I am using Nginx with PHP-FPM and I have checked
> the logs but I can't find anything. Where do I dig? I thought this is
> connected to Nginx configuration?

>From nginx point of view, "your upstream server" is _exact_ thing 
to dig into.  Anything more specific is beyond the scope of this 
list.

Most likely, the problem is in the PHP code on the upstream 
server, as I don't think that PHP itself would return such invalid 
response for any reason.  But see above, it's unrelated to nginx 
and beyond the scope of this list.

-- 
Maxim Dounin
http://nginx.org/