Bug#287726: apache2-common: mem_cache module not working properly
Package: apache2-common
Version: 2.0.52-3
Severity: important
I have a tomcat installation behind a caching apache 2. At first it seems to work:
~$ sudo /etc/init.d/apache2 restart
Restarting web server: Apache2.
~$ wget -q -O- -s http://michiel.omroep.nl/mm18/ | head -12
HTTP/1.1 200 OK
Date: Wed, 29 Dec 2004 18:02:45 GMT
Server: Apache-Coyote/1.1
Expires: Wed, 29 Dec 2004 18:03:45 GMT
Cache-Control: public
Content-Type: text/html;charset=UTF-8
Content-Language: nl
Content-Length: 3350
Via: 1.0 michiel.omroep.nl
Connection: close
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
~$ wget -q -O- -s http://michiel.omroep.nl/mm18/ | head -12
HTTP/1.1 200 OK
Date: Wed, 29 Dec 2004 18:02:48 GMT
Server: Apache/2.0.52 (Debian GNU/Linux) mod_ssl/2.0.52 OpenSSL/0.9.7b
Expires: Wed, 29 Dec 2004 18:03:45 GMT
Cache-Control: public
Content-Type: text/html;charset=UTF-8
Content-Language: nl
Content-Length: 3350
Via: 1.0 michiel.omroep.nl
Age: 3
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
~$
As you see, the second hit is cached.
Now, we wait a minute (until the page expires).
~$ wget -q -O- -s http://michiel.omroep.nl/mm18/ | head -12
HTTP/1.1 200 OK
Date: Wed, 29 Dec 2004 18:03:47 GMT
Server: Apache-Coyote/1.1
Expires: Wed, 29 Dec 2004 18:04:47 GMT
Cache-Control: public
Content-Type: text/html;charset=UTF-8
Content-Language: nl
Content-Length: 3350
Via: 1.0 michiel.omroep.nl
Connection: close
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
~$ wget -q -O- -s http://michiel.omroep.nl/mm18/ | head -12
HTTP/1.1 200 OK
Date: Wed, 29 Dec 2004 18:03:50 GMT
Server: Apache-Coyote/1.1
Expires: Wed, 29 Dec 2004 18:04:50 GMT
Cache-Control: public
Content-Type: text/html;charset=UTF-8
Content-Language: nl
Content-Length: 3350
Via: 1.0 michiel.omroep.nl
Connection: close
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
~$
Now it's not cached any more, and none of the subsequent hits will be, so effectively caching is not
working.
Perhaps you may need this:
/etc/apache2/mods-enabled$ ls -l
total 4
lrwxr-xr-x 1 root root 28 2004-12-29 17:48 00-proxy.load -> ../mods-available/proxy.load
lrwxr-xr-x 1 root root 37 2004-12-29 18:26 asis.load -> /etc/apache2/mods-available/asis.load
lrwxr-xr-x 1 root root 37 2004-12-29 17:44 cgid.conf -> /etc/apache2/mods-available/cgid.conf
lrwxr-xr-x 1 root root 37 2004-12-29 17:44 cgid.load -> /etc/apache2/mods-available/cgid.load
lrwxr-xr-x 1 root root 36 2004-12-29 18:11 cgi.load -> /etc/apache2/mods-available/cgi.load
lrwxr-xr-x 1 root root 30 2004-12-29 17:45 headers.load -> ../mods-available/headers.load
lrwxr-xr-x 1 root root 32 2004-12-29 17:45 mem_cache.load -> ../mods-available/mem_cache.load
lrwxr-xr-x 1 root root 33 2004-12-29 17:46 mime_magic.load -> ../mods-available/mime_magic.load
-rw-r--r-- 1 root root 290 2004-12-29 18:18 proxy.conf
lrwxr-xr-x 1 root root 26 2004-12-29 17:48 ssl.load -> ../mods-available/ssl.load
lrwxr-xr-x 1 root root 40 2004-12-29 17:44 userdir.conf -> /etc/apache2/mods-available/userdir.conf
lrwxr-xr-x 1 root root 40 2004-12-29 17:44 userdir.load -> /etc/apache2/mods-available/userdir.load
/etc/apache2/mods-enabled$ cat proxy.conf
# see mowgli:/e/fp/../conf
#cache
CacheDefaultExpire 5
CacheMaxExpire 30
CacheIgnoreNoLastMod Off
CacheIgnoreCacheControl Off
#mem cache
CacheEnable mem /
MCacheSize 262144
MCacheMaxStreamingBuffer 1048576
MCacheMaxObjectCount 13001
MCacheMaxObjectSize 4194304
MCacheMinObjectSize 1
The proxy is configured like this in apache2/sites-enabled:
ProxyVia on
ProxyPass /mm18 http://michiel.omroep.nl:8070/mm18
ProxyPassReverse /mm18 http://michiel.omroep.nl:8070/mm18
-- System Information:
Debian Release: 3.0
APT prefers unstable
APT policy: (1001, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.9
Locale: LANG=C, LC_CTYPE=C (charmap=UTF-8) (ignored: LC_ALL set to en_US.utf8)
Versions of packages apache2-common depends on:
ii debconf 1.4.22 Debian configuration management sy
ii debianutils 1.16 Miscellaneous utilities specific t
ii libapr0 2.0.52-3 The Apache Portable Runtime
ii libc6 2.3.2.ds1-11 GNU C Library: Shared libraries an
ii libdb4.2 4.2.52-17 Berkeley v4.2 Database Libraries [
ii libexpat1 1.95.8-1 XML parsing C library - runtime li
ii libldap2 2.1.23-1 OpenLDAP libraries
ii libmagic1 4.06-1 File type determination library us
ii libssl0.9.7 0.9.7b-1 SSL shared libraries
ii mime-support 3.18-1 MIME files 'mime.types' & 'mailcap
ii net-tools 1.60-4 The NET-3 networking toolkit
ii openssl 0.9.7c-5 Secure Socket Layer (SSL) binary a
ii ssl-cert 1.0-10 Simple debconf wrapper for openssl
ii zlib1g 1:1.2.1.1-5 compression library - runtime
-- no debconf information
--
Michiel Meeuwissen mihxil'
Mediacentrum 140 H'sum [] ()
+31 (0)35 6772979 nl_NL eo_XX en_US
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