Have you tried to increase the proxy_connect_timeout, proxy_send_timeout,
proxy_read_timeout values? Maybe to 60 or 180 seconds?

----- Original Message -----
From: "OlivierC" <nginx-forum@nginx.us>
To: <nginx@nginx.org>
Sent: Friday, April 13, 2012 10:59 AM
Subject: upstream timed out


> Hi.
>
> I'm the new admin of a website and its servers. I have a frontend nginx
> proxy server and an Apache backend.
> I sometimes have errors :
>
> 2012/04/12 17:44:33 [error] 13442#0: *74193485 upstream timed out (110:
> Connection timed out) while reading response header from upstream,
> client: 98.87.76.65, server: www.mysite.tld, request: "POST /my/url
> HTTP/1.1", upstream: "http://12.23.34.45:80/my/url", host:
> "www.mysite.tld", referrer: "https://www.mysite.tld/another/url"
> 2012/04/12 17:44:33 [error] 13442#0: *74193485 no live upstreams while
> connecting to upstream, client: 98.87.76.65, server: www.mysite.tld,
> request: "POST /my/url HTTP/1.1", upstream: "http://backend/my/url",
> host: "www.mysite.tld", referrer: "https://www.goeland.fr/another/url"
>
> (I've juste anonymized the urls and ip addresses)
>
> Here are the configuration files :
>
> conf.d/proxy.conf :
>
> proxy_redirect off;
> proxy_set_header Host $host;
> proxy_set_header X-Real-IP $remote_addr;
> proxy_set_header X-Forwarded-For
> $proxy_add_x_forwarded_for;
> proxy_set_header X-Forwarded-Proto $scheme;
> client_max_body_size 32M;
> client_body_buffer_size 256k;
> client_header_buffer_size 128k;
> proxy_connect_timeout 30;
> proxy_send_timeout 30;
> proxy_read_timeout 30;
> proxy_buffer_size 32k;
> proxy_buffers 64 32k;
> proxy_busy_buffers_size 128k;
>
>
> conf.d/loadbalancer.conf :
>
> upstream backend {
> ip_hash;
> # web1
> # server 127.0.0.1:8098 backup;
> # web2
> server 44.33.22.11;
> #web3
> server 11.22.33.44 down;
> }
>
>
> sites-enabled/mysite.conf :
>
> server {
> listen 80;
> listen 443 ssl;
> server_name www.mysite.tld www3.mysite.tld;
>
> access_log off; #/home/nginx/log/mysite.access.log;
> #error_log /dev/null crit;
>
> # Possible level values : debug | info | notice | warn | error |
> crit
> error_log /home/nginx/log/mysite.error.log notice;
> log_not_found off;
>
> #set $proto "http";
> #if ( $server_port = "443" ) {
> #set $proto "https";
> #}
>
> # serve static files directly
> location ~*
> ^.+\.(jpg|jpeg|gif|css|png|js|ico|html|pdf|zip|tgz|gz|bz2|swf)$ {
> expires 10d;
> root /home/mysite/www;
> }
>
> location / {
> #proxy_set_header X-Forwarded-Proto $proto;
> proxy_pass http://backend;
> add_header X-Whom candidature@mysite.tld;
> }
>
> error_page 405 = $uri;
> error_page 500 502 503 504 /50x.html;
>
> location = /50x.html {
> root /home/mysitewww;
> }
>
> location = /favicon.ico { access_log off; log_not_found off; }
> }
>
>
> The problem seems to be recent and sometimes happens immediatly after
> clients have paid through the bank online credit card form which is
> integrated (we do not redirect to the bank website). It's a real problem
> for us since when it happens at that moment, clients think their order
> and paiement have not been saved and they order a second time (and also
> pay a second time).
>
> I don't really know what i'm looking for : can it be a network
> connection problem between frontend and backend servers ? Is it because
> of the configuration of the proxy of the server ? or... ?
>
> Thanks for any help.
>
> Posted at Nginx Forum:
> http://forum.nginx.org/read.php?2,225289,225289#msg-225289
>
> _______________________________________________
> nginx mailing list
> nginx@nginx.org
> http://mailman.nginx.org/mailman/listinfo/nginx

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