id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
695	Client connection hangs when responding to error_page 497 with 444	André Bremer		"Trying to set up a stealthy HTTPS server, I'd like to return 444 instead of the default 497 error:

{{{
server {
    server_name         some_server;
    keepalive_timeout   4;
    client_max_body_size 8192;

    listen              443 ssl;
    ssl_protocols       TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers         AES256-SHA:AES128-SHA;
    ssl_certificate     some_cert;
    ssl_certificate_key some_key;
    ssl_session_cache   shared:SSL:10m;
    ssl_session_timeout 10m;

    error_page 497 = @empty;

    location @empty {
        return 444;
    }

    location /some_end_point/ {
        ...
    }

    location / {
        return 444;
    }
}}}

My expectation is that when accessed through http://some_server:443 nginx immediately closes the connection.

Instead, the connection hangs until timing out or explicitly dropped by the client. This is reflected by {{{$request_time}}} in the log. Returning anything but 444 appears to work.
"	defect	closed	minor		nginx-core	1.6.x	duplicate	error_page		Linux some_host 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.6.2
TLS SNI support enabled
configure arguments: --with-cc-opt='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro' --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-pcre-jit --with-ipv6 --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_addition_module --with-http_dav_module --with-http_geoip_module --with-http_gzip_static_module --with-http_image_filter_module --with-http_spdy_module --with-http_sub_module --with-http_xslt_module --with-mail --with-mail_ssl_module --add-module=/build/buildd/nginx-1.6.2/debian/modules/nginx-auth-pam --add-module=/build/buildd/nginx-1.6.2/debian/modules/nginx-dav-ext-module --add-module=/build/buildd/nginx-1.6.2/debian/modules/nginx-echo --add-module=/build/buildd/nginx-1.6.2/debian/modules/nginx-upstream-fair --add-module=/build/buildd/nginx-1.6.2/debian/modules/ngx_http_substitutions_filter_module"