# Epoll\_ctl failed (17: File exists) **URL:** \ **Category:** NGINX\ **Created:** [April 8, 2010, 3:18am UTC](https://www.ruby-forum.com/t/epoll-ctl-failed-17-file-exists/186507 "2010-04-08T03:18:02Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Matthias-Christian\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/cab0a1/32.png) [@Matthias-Christian\_S](https://www.ruby-forum.com/u/Matthias-Christian_S)\ **Post date:** [April 8, 2010, 3:18am UTC](https://www.ruby-forum.com/t/epoll-ctl-failed-17-file-exists/186507/1 "2010-04-08T03:18:02Z")
Hi, when I run ‘/etc/init.d/nginx reload’ on Debian, I get the following error message in /var/log/nginx/error.log and I have to restart nginx: 2010/04/08 03:07:23 [alert] 10719#0: epoll\_ctl(1, 7) failed (17: File exists) $ nginx -V nginx version: nginx/0.7.65 TLS SNI support enabled configure arguments: --conf-path=/etc/nginx/nginx.conf –error-log-path=/var/log/nginx/error.log --pid-path=/var/run/nginx.pid –lock-path=/var/lock/nginx.lock –http-log-path=/var/log/nginx/access.log –http-client-body-temp-path=/var/lib/nginx/body –http-proxy-temp-path=/var/lib/nginx/proxy –http-fastcgi-temp-path=/var/lib/nginx/fastcgi --with-debug –with-http\_stub\_status\_module --with-http\_flv\_module –with-http\_ssl\_module --with-http\_dav\_module –with-http\_gzip\_static\_module --with-http\_realip\_module --with-mail –with-mail\_ssl\_module --with-ipv6 --with-http\_geoip\_module –add-module=/tmp/buildd/nginx-0.7.65/modules/nginx-upstream-fair $ cat /etc/nginx/nginx.conf user www-data; worker\_processes 1; error\_log /var/log/nginx/error.log; pid /var/run/nginx.pid; events { worker\_connections 1024; # multi\_accept on; } http { include /etc/nginx/mime.types; ``` access_log /var/log/nginx/access.log; sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; tcp_nodelay on; gzip on; gzip_static on; gzip_http_version 1.1; gzip_proxied expired no-cache no-store private auth; gzip_disable "MSIE [1-6]\.(?!.*SV1)"; gzip_vary on; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; ``` } # uname -a Linux [example.com](http://example.com) 2.6.26-2-openvz-amd64 #1 SMP Thu Aug 6 01:50:56 UTC 2009 x86\_64 GNU/Linux # mail { […] Any ideas? Regards, Matthias-Christian ---
**Author:** ![Matthias-Christian\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/cab0a1/32.png) [@Matthias-Christian\_S](https://www.ruby-forum.com/u/Matthias-Christian_S)\ **Post date:** [April 8, 2010, 3:24am UTC](https://www.ruby-forum.com/t/epoll-ctl-failed-17-file-exists/186507/2 "2010-04-08T03:24:28Z")
On Thu, Apr 08, 2010 at 03:17:09AM +0200, Matthias-Christian O. wrote: > configure arguments: --conf-path=/etc/nginx/nginx.conf > –add-module=/tmp/buildd/nginx-0.7.65/modules/nginx-upstream-fair > # multi\_accept on; > #keepalive\_timeout 0; > include /etc/nginx/conf.d/_.conf; > include /etc/nginx/sites-enabled/_; > } > > # uname -a > > Linux [example.com](http://example.com) 2.6.26-2-openvz-amd64 #1 SMP Thu Aug 6 01:50:56 UTC 2009 x86\_64 GNU/Linux > > # mail { > > […] This should read: # mail { […] $ uname -a Linux [example.com](http://example.com) 2.6.26-2-openvz-amd64 #1 SMP Thu Aug 6 01:50:56 UTC 2009 x86\_64 GNU/Linux Regards, Matthias-Christian ---
**Author:** ![Matthias-Christian\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/cab0a1/32.png) [@Matthias-Christian\_S](https://www.ruby-forum.com/u/Matthias-Christian_S)\ **Post date:** [April 12, 2010, 2:23pm UTC](https://www.ruby-forum.com/t/epoll-ctl-failed-17-file-exists/186507/3 "2010-04-12T14:23:19Z")
Hi, it took a while to find the bug, but the patch is trivial: — src/core/ngx\_cycle.c~ 2009-10-26 17:22:24.000000000 +0100 +++ src/core/ngx\_cycle.c 2010-04-11 21:14:43.997932783 +0200 @@ -847,7 +847,7 @@ sin61 = (struct sockaddr\_in6 \*) sa1; sin62 = (struct sockaddr\_in6 \*) sa2; - ``` if (sin61->sin6_port != sin61->sin6_port) { ``` - ``` if (sin61->sin6_port != sin62->sin6_port) { return NGX_DECLINED; } ``` Without the patch reloading will fail, because nginx thinks the two IPv6 addresses are the same regardless of the port. Regards, Matthias-Christian ---
**Author:** ![Matthias-Christian\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/cab0a1/32.png) [@Matthias-Christian\_S](https://www.ruby-forum.com/u/Matthias-Christian_S)\ **Post date:** [April 12, 2010, 5:44pm UTC](https://www.ruby-forum.com/t/epoll-ctl-failed-17-file-exists/186507/4 "2010-04-12T17:44:11Z")
Hello! On Sun, Apr 11, 2010 at 09:20:17PM +0200, Matthias-Christian O. wrote: > - > > ``` > if (sin61->sin6_port != sin61->sin6_port) { > > ``` > > - > > ``` > if (sin61->sin6_port != sin62->sin6_port) { > return NGX_DECLINED; > } > > ``` > > Without the patch reloading will fail, because nginx thinks the two IPv6 > addresses are the same regardless of the port. Good catch, thanks. Maxim D.