id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
765	should not perform consistent hash on empty string	openid.yandex.ru/wenzowski		"When an upstream has [http://nginx.org/en/docs/http/ngx_http_upstream_module.html#hash consistent hashing] enabled, eg.

{{{
upstream backend {
  hash $arg_a consistent;
}
}}}

and a request comes in that does not contain the `GET` argument `a` then `$arg_a` defaults to empty string and all requests are forwarded to the same upstream.

Consistent hashing should be disabled when provided an empty string."	defect	closed	major		nginx-module	1.9.x	wontfix			Linux 21ec728a6488 3.19.0 #2 SMP Thu Mar 26 10:44:46 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.9.0
built by gcc 4.9.2 (Debian 4.9.2-10)
built with OpenSSL 1.0.1k 8 Jan 2015 (running with OpenSSL 1.0.1f 6 Jan 2014)
TLS SNI support enabled
configure arguments: --prefix=/opt/nginx --pid-path=/run/nginx.pid --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_spdy_module --with-http_sub_module --with-mail --with-mail_ssl_module --with-stream --add-module=/tmp/build/naxsi-0d53a64ed856e694fcb4038748c8cf6d5551a603/naxsi_src"