id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1064	NGINX DNS CACHING problem.	CorbanR@…		"With the following Configuration 

`stream {
    resolver 169.254.169.253 ipv6=off;   #AWS DNS
    error_log /var/log/nginx/nginx-elb.log info;
    upstream up_prod_tcp_80 {
                server someawselb.us-east-1.elb.amazonaws.com:80 weight=3 max_fails=10 fail_timeout=60s;
                server someawselb2.us-east-1.elb.amazonaws.com:80 max_fails=10 fail_timeout=60s;

   }
    upstream up_prod_tcp_443 {
                server someawselb.us-east-1.elb.amazonaws.com:443 weight=3 max_fails=10 fail_timeout=60s;
                server someawselb2.us-east-1.elb.amazonaws.com:443 max_fails=10 fail_timeout=60s;

   }
    server {
        listen     80;
        proxy_pass up_prod_tcp_80;
    }
    server {
        listen     443;
        proxy_pass up_prod_tcp_443;
    }
}`

I would expect NGINX to cache the DNS based on the TTL of the load balancer, (AWS ELB's are 60s). Seems like anytime the AWS ELB Public IP changes I get `upstream timed out (110: Connection timed out) while connecting to upstream` This is due to NGINX trying to connect to an OLD DNS entry. 

"	defect	closed	minor		nginx-core	1.11.x	invalid			Linux 3.13.0-93-generic #140-Ubuntu SMP Mon Jul 18 21:21:05 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.11.3
built by gcc 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
built with OpenSSL 1.0.1f 6 Jan 2014
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/nginx/modules --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-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_geoip_module=dynamic --with-http_perl_module=dynamic --add-dynamic-module=debian/extra/njs-0.1.0/nginx --with-threads --with-stream --with-stream_ssl_module --with-stream_geoip_module=dynamic --with-http_slice_module --with-mail --with-mail_ssl_module --with-file-aio --with-ipv6 --with-http_v2_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,-Bsymbolic-functions -Wl,-z,relro -Wl,--as-needed'"