# Nginx post ONE request to one more upstream\_addr **URL:** \ **Category:** NGINX\ **Created:** [June 15, 2011, 8:38am UTC](https://www.ruby-forum.com/t/nginx-post-one-request-to-one-more-upstream-addr/208323 "2011-06-15T08:38:35Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\ **Post date:** [June 15, 2011, 8:38am UTC](https://www.ruby-forum.com/t/nginx-post-one-request-to-one-more-upstream-addr/208323/1 "2011-06-15T08:38:35Z")
hi, everyone, # nginx version is 0.8.53, configure (http definition) is : http{ upstream my\_loads { server 10.10.1.12; server 10.10.1.13; } ``` log_format combined_addsvr '$remote_addr - $remote_user ``` [$time\_local] ’ '“$request” $status $body\_bytes\_sent ’ '“$http\_referer” “$http\_user\_agent” $upstream\_addr $upstream\_cache\_status '; access\_log logs/access.log combined\_addsvr; ``` server { listen 80; server_name mytest.com; client_max_body_size 100m; proxy_buffering off; proxy_read_timeout 120; proxy_send_timeout 120; client_body_timeout 120; send_timeout 120; location / { proxy_pass http://my_loads/; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } } ``` =========================================== there is a strange line in log file: (sorry to use xxx replace of true url) 192.168.1.1 - - [14/Jun/2011:20:53:24 +0800] “POST /1.php HTTP/1.1” 200 3729558 “[mytest.com - This website is for sale! - my test Resources and Information.](http://mytest.com/xxx)” “Mozilla/4.0 (compatible; MSIE 7.0;)” 10.10.1.12:80, 10.10.1.13:80 - when nginx deals with 1.php, it sends POST to all upstream servers! the next is normal log: 192.168.1.1 - - [14/Jun/2011:20:53:44 +0800] “POST /1.php HTTP/1.1” 302 2 " [mytest.com - This website is for sale! - my test Resources and Information.](http://mytest.com/xxx)" “Mozilla/4.0 (compatible; MSIE 7.0;)” 10.10.1.12:80 - Could anyone tell me if it is a bug or just any configure improperly? thanks. ---
**Author:** ![MaLi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/5e9695/32.png) [@MaLi](https://www.ruby-forum.com/u/MaLi)\ **Post date:** [June 15, 2011, 9:50am UTC](https://www.ruby-forum.com/t/nginx-post-one-request-to-one-more-upstream-addr/208323/2 "2011-06-15T09:50:17Z")
Hello! On Wed, Jun 15, 2011 at 02:38:08PM +0800, MaLi wrote: > ``` > proxy_buffering off; > } > > ``` > > 192.168.1.1 - - [14/Jun/2011:20:53:44 +0800] “POST /1.php HTTP/1.1” 302 2 " > [http://mytest.com/xxx](http://mytest.com/xxx)" “Mozilla/4.0 (compatible; MSIE 7.0;)” 10.10.1.12:80 - > > Could anyone tell me if it is a bug or just any configure improperly? > thanks. nginx will retry request on next upstream server if first one failed, see here: > **[GitHub - nginxinc/nginx-wiki: ARCHIVED -- Source for the now archived NGINX Wiki...](https://github.com/nginxinc/nginx-wiki)** > > ARCHIVED -- Source for the now archived NGINX Wiki section of https://www.nginx.com Maxim D. ---
**Author:** ![MaLi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/5e9695/32.png) [@MaLi](https://www.ruby-forum.com/u/MaLi)\ **Post date:** [June 15, 2011, 10:03am UTC](https://www.ruby-forum.com/t/nginx-post-one-request-to-one-more-upstream-addr/208323/3 "2011-06-15T10:03:52Z")
Thanks Dounin, actually, both 10.10.1.12 and 10.10.1.13 received the POST items with 1.php (so repeat ran the script) , and why both servers being recorded as Upstream\_addr in the log file? 2011/6/15 Maxim D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![MaLi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/5e9695/32.png) [@MaLi](https://www.ruby-forum.com/u/MaLi)\ **Post date:** [June 15, 2011, 10:19am UTC](https://www.ruby-forum.com/t/nginx-post-one-request-to-one-more-upstream-addr/208323/4 "2011-06-15T10:19:19Z")
oh, I see, Maybe the POST data is too big, then first upstream server cannot response in time. I forgot to point one fact , that is one server maybe only receive part of POST data. thanks again, Dounin. 2011/6/15 Maxim D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![MaLi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/5e9695/32.png) [@MaLi](https://www.ruby-forum.com/u/MaLi)\ **Post date:** [June 15, 2011, 10:07am UTC](https://www.ruby-forum.com/t/nginx-post-one-request-to-one-more-upstream-addr/208323/5 "2011-06-15T10:07:35Z")
Hello! On Wed, Jun 15, 2011 at 04:03:30PM +0800, MaLi wrote: > Thanks Dounin, > > actually, both 10.10.1.12 and 10.10.1.13 received the POST items with 1.php > (so repeat ran the script) , Most likely it’s failed to respond in time, and that’s why nginx retried request. Don’t hesitate to look into error\_log, it should has details. > and why both servers being recorded as Upstream\_addr in the log file? Variable $upstream\_addr should contain addresses of all upstream servers tried, this is how it works. Maxim D. > > > > > > > ’ > > > > > ``` > > > proxy_buffering off; > > > } > > > > > > ``` > > > > > > the next is normal log: > > > > [GitHub - nginxinc/nginx-wiki: ARCHIVED -- Source for the now archived NGINX Wiki section of https://www.nginx.com · GitHub](http://wiki.nginx.org/HttpProxyModule#proxy_next_upstream) > > > > Maxim D. > > > > * * * > > > > nginx mailing list > > [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > > [mailman.nginx.org archive](http://nginx.org/mailman/listinfo/nginx)