Upstream timeout issue

[elgreco]

I forgot to attach the nginx.conf gile

[code]
       gzip on;
        gzip_disable "msie6";

        # gzip_vary on;
        # gzip_proxied any;
         gzip_comp_level 6;
         gzip_buffers 16 8k;
         gzip_http_version 1.1;
         gzip_types text/plain text/css application/json
application/x-javascript text/xml application/xml application/xml+rss
text/javascript;


        ##
        # Balancer 
        ##
        upstream backend {
        server XXX.XXX.XXX.XXX;
     
        }

        server {
          listen 80;
                location / {

                client_max_body_size 50M;
                client_body_buffer_size 256k;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For
$proxy_add_x_forwarded_for;
                proxy_set_header Host $host;
                proxy_pass  http://backend;
                }
        }
[/code]



egreco Wrote:
-------------------------------------------------------
> I setup an upstream configuration with only one
> server for now, i will add a new one in a while.
> 
> im experiencing a strange error now and then when
> users are uploading files to a form they get
> sometimes  in the browser ERROR 502 bad gateway
> and on nginx error logs i get
> 
> 
> 2011/01/10 08:07:31  28135#0: *606977 upstream
> timed out (110: Connection timed out) while
> reading response header from upstream, client:
> XXX.XXX.XXX.XXX, server: , request: "POST
> /UserDetails.aspx?CultureId=1 HTTP/1.1", upstream:
> "http://backend1:80//UserDetails.aspx?CultureId=1"
> , host: "host.host.com", referrer:
> "http://host.host.com/UserDetails.aspx?CultureId=1
> "
> 
> 2011/01/10 08:07:31  28135#0: *606977 no live
> upstreams while connecting to upstream, client:
> XXX.XXX.XXX.XXX, server: , request: "POST
> /UserDetails.aspx?CultureId=1 HTTP/1.1", upstream:
> "http://backend/UserDetails.aspx?CultureId=1",
> host: "host.host.com", referrer:
> "http://host.host.com/UserDetails.aspx?CultureId=1
> "
> 
> 
> now i dont know what is the exact issue, or the
> upload timeout or maybe DNS issues..could it be
> IPv6 dns resolving the problem?
> 
> When the users upload directly to the server they
> dont get any timeout or errors.
> 
> Thanks in advance

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,165055,165056#msg-165056