kill -HUP failing (0.6.32)

[Igor Sysoev]

On Fri, Oct 10, 2008 at 05:48:42AM -0700, Guy Naor wrote:

> I have an nginx setup as a reverse proxy into a large number of Rails and
> Java applications. As it's a very dynamic system, nginx incudes a whole
> directory of conf files, one for each application.
> 
> nginx works really well, but now that we have about 320 different config
> files nginx stopped responding to kill -HUP for reloading the conf files. It
> just ignores the request and nothing happens. My test shows that at 247
> files it stop responding to HUP. Up to that number it's all ok and HUP works
> perfectly. The files are all pretty much the same, with this format:
> 
> 
> # Definition of the different compute instances we proxy into
> upstream redmine_nginx {
>   server 10.252.179.143:5150;
> }
> 
> # vhost definition for this application
> server {
>   listen 80;
>   client_max_body_size 10M;
>   client_body_buffer_size 128k;
>   server_name redmine.morphexchange.com ; # Add the redirected domains here
> (like: www.gadgets.com that is redirected to gadgets.mex.com)
>   set $original_uri $uri;
>   access_log /mnt/nginx/logs/redmine/access.log main;
>   error_log  /mnt/nginx/logs/redmine/error.log warn;
>   location ~* ^.*/(themes|stylesheets|javascripts|images)(/.*$|$) {
>     proxy_pass        http://redmine_nginx;
>     proxy_set_header  X-Real-IP  $http_x_source_address;
>     proxy_set_header Host $host;
>   }
>   location / {
>     proxy_set_header  X-Real-IP  $http_x_source_address;
>     proxy_intercept_errors  on;
>     proxy_set_header Host $host;
>     error_page  400 401 403 404 414 500 501 502 503 504 505 506 507 508 509
> 510  =  @rails_redmine;
>     if ($request_method = POST ) {
>       proxy_pass        http://redmine_nginx;
>      break;
>     }
>     if ($is_args = "?" ) {
>       proxy_pass        http://redmine_nginx;
>      break;
>     }
> 
>   }
>   location @rails_redmine {
>     rewrite (.*) $original_uri break;
>     proxy_pass        http://redmine_nginx;
>     proxy_set_header  X-Real-IP  $http_x_source_address;
>     proxy_set_header Host $host;
>    }
> }
> 
> I also tried to increase the server hash size and bucket size but it didn't
> help.
> 
> Looking at the code, there are a lot of conditions that might result in HUP
> failing, but those are not logged. Any idea what might be causing this? The
> same config with less files has no problem with the HUP signal.

What does "nginx -t" show ?


-- 
Igor Sysoev
http://sysoev.ru/en/