https://issues.apache.org/bugzilla/show_bug.cgi?id=48388
Alex Tavcar <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |NEW --- Comment #2 from Alex Tavcar <[email protected]> 2010-08-30 18:00:38 EDT --- After a few years since early apache httpd 2.2.x releases I give it another try to migrate our apache httpd proxy server from 2.0.x versions to 2.2.x. Still there is an issue with unresponsive backend servers with 503 error on apache httpd proxy. Both versions have practically the same configuration, but with 2.0.x version we do not experience any user experience errors, while with 2.2.x versions users get 503 errors and timeouts for simple webpages. Old apache httpd 2.0.63 proxy error_log: [Fri Aug 20 10:11:42 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 20 11:47:14 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 20 17:25:16 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 20 18:07:02 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 20 19:04:31 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Sat Aug 21 06:49:18 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Sat Aug 21 17:06:21 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Sat Aug 21 18:34:41 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Sun Aug 22 11:02:49 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Mon Aug 23 08:39:00 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Tue Aug 24 16:34:32 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 07:36:21 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed When we switch to apache httpd 2.2.16 proxy we get immediate bad user experience hit with http 503 errors and timeouts on proxy server, while 2.2.x backend servers have same load: [Wed Aug 25 07:36:21 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Wed Aug 25 08:28:22 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 08:28:22 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Wed Aug 25 09:05:19 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 09:05:19 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Wed Aug 25 09:10:03 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 09:10:03 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Wed Aug 25 09:18:32 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 09:18:32 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Wed Aug 25 09:51:51 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 09:51:51 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Wed Aug 25 09:53:38 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 09:53:38 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Wed Aug 25 10:00:12 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 10:00:12 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Wed Aug 25 10:04:21 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 10:04:21 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Wed Aug 25 10:06:06 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Wed Aug 25 10:06:06 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) ..... [Fri Aug 27 09:21:53 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Fri Aug 27 09:22:39 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:35:38 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:35:38 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Fri Aug 27 09:36:22 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:36:22 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Fri Aug 27 09:36:36 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:37:33 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:37:33 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Fri Aug 27 09:41:46 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:41:46 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Fri Aug 27 09:42:05 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:42:05 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Fri Aug 27 09:42:08 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:42:08 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) [Fri Aug 27 09:42:32 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:42:32 2010] [error] ap_proxy_connect_backend disabling worker for (www.domain.com) Switch back to apache httpd 2.0.63 proxy and we immediate get normal user experience, due to error in error_log: [Fri Aug 27 09:43:07 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:51:34 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 09:59:50 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 10:00:35 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 10:00:35 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 10:20:59 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 10:21:00 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 10:34:03 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 10:37:59 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed [Fri Aug 27 10:38:15 2010] [error] (110)Connection timed out: proxy: HTTP: attempt to connect to 192.168.102.2:80 (www.domain.com) failed -- Configure bugmail: https://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
