id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
151	X-Accel-Expires send by upstream overrides all values set with fastcgi_cache_valid, including 50x errors	Albert Szelagowski	somebody	"It is a very useful feature, as it allows you to override default TTL set for various responses in fastcgi_cache_valid directive, but the problem is that it allows to override all of them, including all 50x errors, so you may end up caching WSOD if the TTL logic used to send X-Accel-Expires header in the upstream app (in our case it is Drupal) has some default TTL with value higher than one second.

It looks like Nginx should allow to override TTL only for those OK default codes: 200, 301 and 302 and never allow to override the TTL set in fastcgi_cache_valid if the response is different than 200, 301 and 302, so all other responses will honor TTL set (if any) in fastcgi_cache_valid instead of accept whatever is send in the X-Accel-Expires header from the backend."	defect	closed	minor		nginx-core	1.0.x	invalid			Linux v189q.nyc.host8.biz 2.6.31.14-vs2.3.0.36.28.2-beng #1 SMP Mon Aug 9 10:18:48 BST 2010 x86_64 GNU/Linux	"nginx version: nginx/1.0.14
built by gcc 4.3.2 (Debian 4.3.2-1.1) 
TLS SNI support enabled
configure arguments: --prefix=/usr --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/lock/nginx.lock --user=www-data --group=www-data --with-http_realip_module --with-http_gzip_static_module --with-http_stub_status_module --with-http_ssl_module --without-mail_pop3_module --without-mail_imap_module --without-mail_smtp_module --without-http_scgi_module --without-http_uwsgi_module --with-debug --with-ipv6 --with-http_geoip_module --add-module=/var/opt/nginx-upload-progress-module/ --add-module=/var/opt/ngx_cache_purge/"