id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
552	Nginx doesn't honor net.ipv6.conf.all.disable_ipv6	openid.yandex.ru/loft1712		"Changeset http://hg.nginx.org/nginx/rev/ec8594b9bf11 should disable IPv6 requests to the backend in case of net.ipv6.conf.all.disable_ipv6=1

IPv6 is disabled on our system, however nginx still tries to send requests using IPv6:

{{{
$ sysctl -a | fgrep disable_ipv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv6.conf.eth0.disable_ipv6 = 1
}}}

error.log:
{{{
2014/04/30 07:07:00 [error] 3013#0: *705888 connect() to [2a00:bdc0:2:c:2::1b61]:80 failed (101: Network is unreachable) while connecting to upstream, client: 111.222.333.444, server: example.com, request: ""GET / HTTP/1.1"", upstream: ""http://[2a00:bdc0:2:c:2::1b61]:80/"", host: ""example.com"", referrer: ""http://example.com/""
}}}

Could you fix this issue or suggest quick workaround?"	defect	closed	major		nginx-core		invalid	nginx, ipv6		Linux example.com 3.2.0-4-amd64 #1 SMP Debian 3.2.57-3 x86_64 GNU/Linux	"nginx version: nginx/1.6.0
built by gcc 4.7.2 (Debian 4.7.2-5)
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-http_ssl_module --with-http_realip_module --with-http_addition_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_stub_status_module --with-http_auth_request_module --with-mail --with-mail_ssl_module --with-file-aio --with-http_spdy_module --with-cc-opt='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-z,relro -Wl,--as-needed' --with-ipv6
"