id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
2563	Does not respect cache-control when using proxy_cache_use_stale updating	aminvakil@…		"We have 

{{{
proxy_cache_use_stale updating ...
}}}

in our proxy configurations, and on some paths, upstream is sending
{{{
cache-control: no-cache, no-store, must-revalidate
pragma: no-cache
expires: 0
}}}
in a 302 response.

It seems that nginx is caching this sometimes, because some clients are receiving 404 and all of those requests are 
{{{
cache_status=UPDATING
}}}
.

It happens for 1 percent of clients and whenever I try to reproduce this I get 
{{{
cache_status=EXPIRED
}}}
, so I'm not sure how to go further with this."	defect	closed	minor		documentation	1.22.x	duplicate		aminvakil@…	Linux hostname 4.19.0-25-amd64 #1 SMP Debian 4.19.289-2 (2023-08-08) x86_64 GNU/Linux	"nginx version: nginx/1.22.0
built by gcc 8.3.0 (Debian 8.3.0-6) 
built with OpenSSL 1.1.1n  15 Mar 2022
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-compat --with-file-aio --with-threads --with-http_auth_request_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-cc-opt='-g -O2 -fdebug-prefix-map=/path/to/nginx-1.22.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fPIC' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -Wl,--as-needed -pie'"