# Nginx Proxy Cache and Tomcat

**URL:** <https://www.ruby-forum.com/t/nginx-proxy-cache-and-tomcat/198872>\
**Category:** NGINX\
**Created:** [November 9, 2010, 6:52pm UTC](https://www.ruby-forum.com/t/nginx-proxy-cache-and-tomcat/198872 "2010-11-09T18:52:02Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![okkezSS](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/o/85f322/32.png) [@okkezSS](https://www.ruby-forum.com/u/okkezSS)\
**Post date:** [November 9, 2010, 6:52pm UTC](https://www.ruby-forum.com/t/nginx-proxy-cache-and-tomcat/198872/1 "2010-11-09T18:52:02Z")

</div>

Hello,

We need a little bit of help to understand what’s wrong with our  
config.  
We try to setup a reverse proxy cache using Nginx but somthing seems to  
be wrong with our configuration.  
Behind the Nginx there is a tomcat server.

The problem is that Nginx doesn’t cache at all.  
Logs shows that the content isen’t cacheable, but we diden’t understand  
why !!

The config is:

nginx -V  
nginx version: nginx/0.8.53  
built by gcc 4.4.3 20100127 (Red Hat 4.4.3-4) (GCC)  
configure arguments: --with-debug

nginx.conf  
worker\_processes 2;  
error\_log logs/error.log debug\_core debug\_http debug\_alloc debug\_mutex  
debug\_event ;  
worker\_rlimit\_nofile 8192;  
events {  
worker\_connections 1024;  
use epoll;  
}

http {  
include mime.types;  
default\_type application/octet-stream;  
sendfile on;  
client\_body\_buffer\_size 1m;  
proxy\_buffering on;  
proxy\_buffer\_size 4k;  
proxy\_buffers 8 32k;  
tcp\_nopush on;

```
#keepalive_timeout 0;
keepalive_timeout 65;

#gzip on;

proxy_cache_path /tmp/cache levels=1:2 keys_zone=tmpcache:15m;

server {
    listen 8080;
    server_name myservername;

    #charset koi8-r;

    #access_log logs/host.access.log main;

    location / {
        proxy_pass http://localhost:8085;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For

```

$proxy\_add\_x\_forwarded\_for;  
}

```
    location /test/v1/ {
        proxy_pass http://localhost:8085;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For

```

$proxy\_add\_x\_forwarded\_for;  
proxy\_cache\_valid 200 301 302 120m;  
expires 864000;  
proxy\_cache tmpcache;  
}  
}  
}

logs:  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http request line: “GET  
/test/v1/lookup/?method=listConnectedCountries HTTP/1.1”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http uri: “/test/v1/lookup/”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http args:  
“method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http exten: “”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http process request header line  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http header: “Host:  
myhostname:8080”  
2010/11/09 17:08:35 [debug] 3900#0: _1 http header: “User-Agent:  
Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:1.9.2.12) Gecko/20101026  
AskTbUT2V5/3.9.1.14019 Firefox/3.6.12 ( .NET CLR 3.5.30729)”  
2010/11/09 17:08:35 [debug] 3900#0: 1 http header: "Accept:  
text/html,application/xhtml+xml,application/xml;q=0.9,/_;q=0.8"  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http header: “Accept-Language:  
fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http header: “Accept-Encoding:  
gzip,deflate”  
2010/11/09 17:08:35 [debug] 3900#0: _1 http header: "Accept-Charset:  
ISO-8859-1,utf-8;q=0.7,_;q=0.7"  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http header: “Keep-Alive: 115”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http header: “Connection:  
keep-alive”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http header: “Cookie:  
\_\_utma=38270632.803570674.1278490999.1288117398.1288363663.11;  
\_\_utmz=38270632.1278490999.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http header: “Pragma: no-cache”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http header: “Cache-Control:  
no-cache”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http header done  
2010/11/09 17:08:35 [debug] 3900#0: \*1 event timer del: 11: 832387028  
2010/11/09 17:08:35 [debug] 3900#0: \*1 rewrite phase: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 test location: “/”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 test location: “test/v1/”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 using configuration “/test/v1/”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http cl:-1 max:1048576  
2010/11/09 17:08:35 [debug] 3900#0: \*1 rewrite phase: 2  
2010/11/09 17:08:35 [debug] 3900#0: \*1 post rewrite phase: 3  
2010/11/09 17:08:35 [debug] 3900#0: \*1 generic phase: 4  
2010/11/09 17:08:35 [debug] 3900#0: \*1 generic phase: 5  
2010/11/09 17:08:35 [debug] 3900#0: \*1 access phase: 6  
2010/11/09 17:08:35 [debug] 3900#0: \*1 access phase: 7  
2010/11/09 17:08:35 [debug] 3900#0: \*1 post access phase: 8  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http init upstream, client timer:  
0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 epoll add event: fd:11 op:3  
ev:80000005  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http cache key:  
“[http://localhost:8085](http://localhost:8085)”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http cache key:  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 add cleanup: 08CF0DD0  
2010/11/09 17:08:35 [debug] 3900#0: slab alloc: 76 slot: 4  
2010/11/09 17:08:35 [debug] 3900#0: slab alloc: B5A8C000  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http file cache exists: -5 e:0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 cache file:  
“/tmp/cache/9/3f/e20791cdfc84e7878b482605b9bdd3f9”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 add cleanup: 08CF0E10  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream cache: -5  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script copy: "Host: "  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script var:  
“myhostname:8080”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script copy: "  
"  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script copy: "X-Real-IP: "  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script var: “myhostipaddr”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script copy: "  
"  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script copy:  
“X-Forwarded-For: "  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script var: “myhostipaddr”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script copy: "  
"  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http script copy: “Connection:  
close  
"  
2010/11/09 17:08:35 [debug] 3900#0: _1 http proxy header: “User-Agent:  
Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:1.9.2.12) Gecko/20101026  
AskTbUT2V5/3.9.1.14019 Firefox/3.6.12 ( .NET CLR 3.5.30729)”  
2010/11/09 17:08:35 [debug] 3900#0: 1 http proxy header: "Accept:  
text/html,application/xhtml+xml,application/xml;q=0.9,/_;q=0.8”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header:  
“Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header:  
“Accept-Encoding: gzip,deflate”  
2010/11/09 17:08:35 [debug] 3900#0: _1 http proxy header:  
"Accept-Charset: ISO-8859-1,utf-8;q=0.7,_;q=0.7”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header: “Cookie:  
\_\_utma=38270632.803570674.1278490999.1288117398.1288363663.11;  
\_\_utmz=38270632.1278490999.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)”  
2010/11/09 17:08:35 [debug] 3900#0: _1 http proxy header: “Pragma:  
no-cache”  
2010/11/09 17:08:35 [debug] 3900#0: 1 http proxy header:  
“Cache-Control: no-cache”  
2010/11/09 17:08:35 [debug] 3900#0: 1 http proxy header:  
"GET /test/v1/lookup/?method=listConnectedCountries HTTP/1.0  
Host: myhostname:8080  
X-Real-IP: myhostipaddr  
X-Forwarded-For: myhostipaddr  
Connection: close  
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:1.9.2.12)  
Gecko/20101026 AskTbUT2V5/3.9.1.14019 Firefox/3.6.12 ( .NET CLR  
3.5.30729)  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8  
Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3  
Accept-Encoding: gzip,deflate  
Accept-Charset: ISO-8859-1,utf-8;q=0.7,_;q=0.7  
Cookie: \_\_utma=38270632.803570674.1278490999.1288117398.1288363663.11;  
\_\_utmz=38270632.1278490999.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)  
Pragma: no-cache  
Cache-Control: no-cache

"  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http cleanup add: 08CF1164  
2010/11/09 17:08:35 [debug] 3900#0: \*1 get rr peer, try: 2  
2010/11/09 17:08:35 [debug] 3900#0: \*1 get rr peer, current: 1 1  
2010/11/09 17:08:35 [debug] 3900#0: \*1 socket 12  
2010/11/09 17:08:35 [debug] 3900#0: \*1 epoll add connection: fd:12  
ev:80000005  
2010/11/09 17:08:35 [debug] 3900#0: \*1 connect to 127.0.0.1:8085, fd:12  
#2  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream connect: -2  
2010/11/09 17:08:35 [debug] 3900#0: \*1 event timer add: 12:  
60000:832387049  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http finalize request: -4,  
“/test/v1/lookup/?method=listConnectedCountries” a:1, c:2  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http request count:2 blk:0  
2010/11/09 17:08:35 [debug] 3900#0: posted event 00000000  
2010/11/09 17:08:35 [debug] 3900#0: worker cycle  
2010/11/09 17:08:35 [debug] 3900#0: accept mutex locked  
2010/11/09 17:08:35 [debug] 3900#0: epoll timer: 60000  
2010/11/09 17:08:35 [debug] 3900#0: epoll: fd:11 ev:0004 d:08D00B78  
2010/11/09 17:08:35 [debug] 3900#0: \*1 post event 08D23B40  
2010/11/09 17:08:35 [debug] 3900#0: epoll: fd:12 ev:0004 d:08D00BD0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 post event 08D23B74  
2010/11/09 17:08:35 [debug] 3900#0: timer delta: 1  
2010/11/09 17:08:35 [debug] 3900#0: posted events 08D23B74  
2010/11/09 17:08:35 [debug] 3900#0: posted event 08D23B74  
2010/11/09 17:08:35 [debug] 3900#0: \*1 delete posted event 08D23B74  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream request:  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream send request  
handler  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream send request  
2010/11/09 17:08:35 [debug] 3900#0: \*1 chain writer buf fl:1 s:713  
2010/11/09 17:08:35 [debug] 3900#0: \*1 chain writer in: 08CF1180  
2010/11/09 17:08:35 [debug] 3900#0: \*1 writev: 713  
2010/11/09 17:08:35 [debug] 3900#0: \*1 chain writer out: 00000000  
2010/11/09 17:08:35 [debug] 3900#0: \*1 event timer del: 12: 832387049  
2010/11/09 17:08:35 [debug] 3900#0: \*1 event timer add: 12:  
60000:832387050  
2010/11/09 17:08:35 [debug] 3900#0: posted event 08D23B40  
2010/11/09 17:08:35 [debug] 3900#0: \*1 delete posted event 08D23B40  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http run request:  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream check client, write  
event:1, “/test/v1/lookup/”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream recv(): -1 (11:  
Resource temporarily unavailable)  
2010/11/09 17:08:35 [debug] 3900#0: posted event 00000000  
2010/11/09 17:08:35 [debug] 3900#0: worker cycle  
2010/11/09 17:08:35 [debug] 3900#0: accept mutex locked  
2010/11/09 17:08:35 [debug] 3900#0: epoll timer: 60000  
2010/11/09 17:08:35 [debug] 3900#0: epoll: fd:12 ev:0005 d:08D00BD0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 post event 08D16B6C  
2010/11/09 17:08:35 [debug] 3900#0: \*1 post event 08D23B74  
2010/11/09 17:08:35 [debug] 3900#0: timer delta: 7  
2010/11/09 17:08:35 [debug] 3900#0: posted events 08D23B74  
2010/11/09 17:08:35 [debug] 3900#0: posted event 08D23B74  
2010/11/09 17:08:35 [debug] 3900#0: \*1 delete posted event 08D23B74  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream request:  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream dummy handler  
2010/11/09 17:08:35 [debug] 3900#0: posted event 08D16B6C  
2010/11/09 17:08:35 [debug] 3900#0: \*1 delete posted event 08D16B6C  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream request:  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream process header  
2010/11/09 17:08:35 [debug] 3900#0: \*1 malloc: 08CF1508:4096  
2010/11/09 17:08:35 [debug] 3900#0: \*1 recv: fd:12 354 of 3998  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy status 200 “200 OK”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header: “Server:  
Apache-Coyote/1.1”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header: “Pragma:  
no-cache”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header: “Expires: Thu,  
01 Jan 1970 00:00:00 GMT”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header:  
“Cache-Control: no-cache”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header:  
“Cache-Control: no-store”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header: “Date: Tue, 09  
Nov 2010 17:08:35 GMT”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header: “Connection:  
close”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header done  
2010/11/09 17:08:35 [debug] 3900#0: \*1 HTTP/1.1 200 OK  
Server: nginx/0.8.53  
Date: Tue, 09 Nov 2010 17:08:35 GMT  
Transfer-Encoding: chunked  
Connection: keep-alive  
Expires: Fri, 19 Nov 2010 17:08:35 GMT  
Cache-Control: max-age=864000

2010/11/09 17:08:35 [debug] 3900#0: \*1 write new buf t:1 f:0 08CF13B8,  
pos 08CF13B8, size: 201 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http write filter: l:0 f:0 s:201  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http cacheable: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http file cache free, fd: -1  
2010/11/09 17:08:35 [debug] 3900#0: slab free: B5A8C000  
2010/11/09 17:08:35 [debug] 3900#0: \*1 posix\_memalign: 08D30AE0:4096  
@16  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream process upstream  
2010/11/09 17:08:35 [debug] 3900#0: \*1 pipe read upstream: 1  
2010/11/09 17:08:35 [debug] 3900#0: \*1 pipe preread: 144  
2010/11/09 17:08:35 [debug] 3900#0: \*1 readv: 1:3644  
2010/11/09 17:08:35 [debug] 3900#0: \*1 pipe recv chain: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 pipe buf free s:0 t:1 f:0  
08CF1508, pos 08CF163C, size: 144 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 input buf #0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 pipe write downstream: 1  
2010/11/09 17:08:35 [debug] 3900#0: \*1 pipe write downstream flush in  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http output filter  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http copy filter:  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http postpone filter  
“/test/v1/lookup/?method=listConnectedCountries” 08CF14C8  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http chunk: 144  
2010/11/09 17:08:35 [debug] 3900#0: \*1 write old buf t:1 f:0 08CF13B8,  
pos 08CF13B8, size: 201 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 write new buf t:1 f:0 00000000,  
pos 08CF14D8, size: 4 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 write new buf t:1 f:0 08CF1508,  
pos 08CF163C, size: 144 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 write new buf t:0 f:0 00000000,  
pos 080AE7E1, size: 2 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http write filter: l:0 f:0 s:351  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http copy filter: 0  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 pipe write downstream done  
2010/11/09 17:08:35 [debug] 3900#0: \*1 event timer: 12, old: 832387050,  
new: 832387057  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream exit: 00000000  
2010/11/09 17:08:35 [debug] 3900#0: \*1 finalize http upstream request:  
0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 finalize http proxy request  
2010/11/09 17:08:35 [debug] 3900#0: \*1 free rr peer 2 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 close http upstream connection:  
12  
2010/11/09 17:08:35 [debug] 3900#0: \*1 event timer del: 12: 832387050  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http upstream temp fd: -1  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http output filter  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http copy filter:  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http postpone filter  
“/test/v1/lookup/?method=listConnectedCountries” BF969EE8  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http chunk: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 write old buf t:1 f:0 08CF13B8,  
pos 08CF13B8, size: 201 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 write old buf t:1 f:0 00000000,  
pos 08CF14D8, size: 4 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 write old buf t:1 f:0 08CF1508,  
pos 08CF163C, size: 144 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 write old buf t:0 f:0 00000000,  
pos 080AE7E1, size: 2 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 write new buf t:0 f:0 00000000,  
pos 080AE7DE, size: 5 file: 0, size: 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http write filter: l:1 f:0 s:356  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http write filter limit 0  
2010/11/09 17:08:35 [debug] 3900#0: \*1 writev: 356  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http write filter 00000000  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http copy filter: 0  
“/test/v1/lookup/?method=listConnectedCountries”  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http finalize request: 0,  
“/test/v1/lookup/?method=listConnectedCountries” a:1, c:1  
2010/11/09 17:08:35 [debug] 3900#0: \*1 set http keepalive handler  
2010/11/09 17:08:35 [debug] 3900#0: \*1 http close request

Thank you in advance for your help.

Posted at Nginx Forum:

> **[Nginx Proxy Cache and Tomcat](https://forum.nginx.org/read.php?2,149206,149206#msg-149206)**
>
> Hello, We need a little bit of help to understand what's wrong with our config. We try to setup a reverse proxy cache using Nginx but somthing seems to be wrong with our configuration. Behind the Nginx there is a tomcat server. The problem is that...

---

<div class="post-metadata">

**Author:** ![nams](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e47c2d/32.png) [@nams](https://www.ruby-forum.com/u/nams)\
**Post date:** [November 9, 2010, 7:40pm UTC](https://www.ruby-forum.com/t/nginx-proxy-cache-and-tomcat/198872/2 "2010-11-09T19:40:59Z")

</div>

not sure if this would help but worth a try, also give  
“[Module ngx\_http\_proxy\_module](http://wiki.nginx.org/NginxHttpProxyModule#proxy_cache)” a read

proxy\_cache\_key  
syntax: proxy\_cache\_key line;

default: $scheme$proxy\_host$request\_uri;

context: http, server, location

The directive specifies what information is included in the key for  
caching, for example  
proxy\_cache\_key “$host$request\_uri$cookie\_user”;  
Note that by default, the hostname of the server is not included in the  
cache key. If you are using subdomains for different locations on your  
website, you need to include it, e.g. by changing the cache key to  
something like  
proxy\_cache\_key “$scheme$host$request\_uri”;

-Payam

---

<div class="post-metadata">

**Author:** ![nams](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e47c2d/32.png) [@nams](https://www.ruby-forum.com/u/nams)\
**Post date:** [November 9, 2010, 9:39pm UTC](https://www.ruby-forum.com/t/nginx-proxy-cache-and-tomcat/198872/3 "2010-11-09T21:39:42Z")

</div>

Hello!

On Tue, Nov 09, 2010 at 12:50:14PM -0500, nams wrote:

> why !!  
> […]

> 2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header: “Expires: Thu, 01 Jan  
> 1970 00:00:00 GMT”  
> 2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header: “Cache-Control:  
> no-cache”  
> 2010/11/09 17:08:35 [debug] 3900#0: \*1 http proxy header: “Cache-Control:  
> no-store”

See [GitHub - nginxinc/nginx-wiki: ARCHIVED -- Source for the now archived NGINX Wiki section of https://www.nginx.com · GitHub](http://wiki.nginx.org/HttpProxyModule#proxy_ignore_headers)  
if you want to instruct nginx to ignore these headers.

Maxim D.

---

<div class="post-metadata">

**Author:** ![nams](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e47c2d/32.png) [@nams](https://www.ruby-forum.com/u/nams)\
**Post date:** [November 10, 2010, 3:03pm UTC](https://www.ruby-forum.com/t/nginx-proxy-cache-and-tomcat/198872/4 "2010-11-10T15:03:44Z")

</div>

Hello,

Thank you for your help.

Now it works fine.

As suggested by Maxim, i used the proxy\_ignore\_headers directive to  
igonre Expires Cache-Control headers.

Thanks again.

Posted at Nginx Forum:

> **[Re: Nginx Proxy Cache and Tomcat](https://forum.nginx.org/read.php?2,149206,149473#msg-149473)**
>
> Hello, We need a little bit of help to understand what's wrong with our config. We try to setup a reverse proxy cache using Nginx but somthing seems to be wrong with our configuration. Behind the Nginx there is a tomcat server. The problem is that...