id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1262	connect_(timeout|error) option in proxy_next_upstream	CAFxX@…		"Currently proxy_next_upstream supports only ""error"" or ""timeout"", that are [https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_next_upstream defined] as:

error
   an error occurred '''while establishing a connection with the server, passing a request to it, or reading the response header''';
timeout
   a timeout has occurred '''while establishing a connection with the server, passing a request to it, or reading the response header''';

both conditions are pretty broad: it would be very helpful to have better control over which phase the error/timeout happens. In one of our use-cases it would be very useful to limit the failover to the connection establishment phase, i.e. something along those lines:

connect_error
   an error occurred '''while establishing a connection with the server''';
connect_timeout
   a timeout has occurred '''while establishing a connection with the server''';

We're running nginx 1.10.x on linux 4.4.x, but even in the current 1.13.x this is still not supported."	enhancement	new	minor		nginx-module	1.10.x				Linux 7ad2956b-1f7d-42ee-8bcc-41c63ae64958 4.4.0-53-generic #74~14.04.1-Ubuntu SMP Fri Dec 2 03:43:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.10.1
built by gcc 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
configure arguments: --prefix=/var/vcap/packages/nginx --error-log-path=stderr --with-pcre=../pcre-8.39 --with-pcre-jit --add-module=../headers-more-nginx-module-0.31 --with-http_realip_module --with-http_stub_status_module"