id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1359	Map command  map $upstream_http_cache_control $bypass_cache_control ignored with proxy_cache_bypass $bypass_cache_control	chazerbazer@…		"We are using the following map directive:

{{{
   map $upstream_http_cache_control $bypass_cache_control {
     ""max-age=60"" 1;
      default       0;
  }

}}}

Within location block we have:
{{{
   location / {
---snip---
        proxy_cache_bypass $bypass_cache_control; 
---snip---
}
}}}
Like this our map command does is not remapping. From a client we see:
{{{
$ curl --head http://playpen02/benula/Aldjia.jpg
HTTP/1.1 200 OK
Server: nginx/1.13.4
Date: Thu, 17 Aug 2017 15:42:44 GMT
Content-Type: image/jpeg
Content-Length: 0
Connection: keep-alive
Cache-Control: max-age=60
upstream_http_cache_control: :max-age=60:
Mapped_Cache-Control: 0
X-Proxy-Cache: HIT
}}}

If we remove proxy_cache_bypass $bypass_cache_control 

{{{
   location / {
---snip---
       # proxy_cache_bypass $bypass_cache_control; 
---snip---
}
}}}

we now see our map statement working as expected;
{{{
$ curl --head http://playpen02/benula/Aldjia.jpg
HTTP/1.1 200 OK
Server: nginx/1.13.4
Date: Thu, 17 Aug 2017 15:44:47 GMT
Content-Type: image/jpeg
Content-Length: 0
Connection: keep-alive
Cache-Control: max-age=60
upstream_http_cache_control: :max-age=60:
Mapped_Cache-Control: 1
X-Proxy-Cache: EXPIRED
}}}

Why are we seeing the difference in behaviour when the inclusion of the proxy_cache_bypass directive?"	defect	closed	minor		nginx-module	1.13.x	invalid	map, proxy_cache_bypass	Neil.Craig@… Paul.Merry@…	Linux playpen02 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.13.4
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) 
built with OpenSSL 1.0.1e-fips 11 Feb 2013
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/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_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_random_index_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-mail --with-mail_ssl_module --with-stream --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -fPIC' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -pie'
"