Hi, from 2.4.48 on, mod_proxy-cache example [1] begins to fail for me. Unfortunately I can not manage to expose this issue outside apache-rex framework sofar. With 2.4.46, I can not see this at all.
$ git clone https://github.com/pgajdos/apache-rex.git $ cd apache-rex $ ./run-rex mod_proxy-cache [..] [1] reverse proxy with cache < X-Cache: MISS from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test 1 misses, 0 revalidates and 9 hits [2] forward proxy with cache < X-Cache: MISS from test < X-Cache: REVALIDATE from test < X-Cache: REVALIDATE from test < X-Cache: REVALIDATE from test < X-Cache: REVALIDATE from test < X-Cache: REVALIDATE from test < X-Cache: REVALIDATE from test < X-Cache: REVALIDATE from test < X-Cache: REVALIDATE from test < X-Cache: REVALIDATE from test 1 misses, 9 revalidates and 0 hits Example FAILED (subexample #2): [..] $ Former behavior for 2.4.46: [1] reverse proxy with cache < X-Cache: MISS from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test 1 misses, 0 revalidates and 9 hits [2] forward proxy with cache < X-Cache: MISS from test < X-Cache: REVALIDATE from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test < X-Cache: HIT from test 1 misses, 1 revalidates and 8 hits Roughly: the example config (/tmp/apache-rex/mod_proxy-cache/httpd.conf) looks like: ------------------------------8<------------------------------------ ServerName test User abuild Group abuild Listen 60080 PidFile /tmp/apache-rex/mod_proxy-cache/pid ErrorLog /tmp/apache-rex/mod_proxy-cache/error_log LoadModule auth_basic_module /usr/lib64/apache2-prefork/mod_auth_basic.so LoadModule dir_module /usr/lib64/apache2-prefork/mod_dir.so LoadModule authz_host_module /usr/lib64/apache2-prefork/mod_authz_host.so LoadModule proxy_module /usr/lib64/apache2-prefork/mod_proxy.so LoadModule proxy_http_module /usr/lib64/apache2-prefork/mod_proxy_http.so LoadModule cache_module /usr/lib64/apache2-prefork/mod_cache.so LoadModule log_config_module /usr/lib64/apache2-prefork/mod_log_config.so LoadModule authz_core_module /usr/lib64/apache2-prefork/mod_authz_core.so LoadModule cache_socache_module /usr/lib64/apache2-prefork/mod_cache_socache.so LoadModule socache_shmcb_module /usr/lib64/apache2-prefork/mod_socache_shmcb.so DocumentRoot /tmp/apache-rex/mod_proxy-cache/htdocs DirectoryIndex index.html ### example configuration LogFormat "%s %{cache-status}e" cache_format Listen 60081 <VirtualHost *:60081> ErrorLog "/tmp/apache-rex/mod_proxy-cache/error_log-backend" DocumentRoot "/tmp/apache-rex/mod_proxy-cache/htdocs-backend" <Directory "/tmp/apache-rex/mod_proxy-cache/htdocs-backend"> Require local </Directory> </VirtualHost> Listen 60082 <VirtualHost *:60082> ErrorLog "/tmp/apache-rex/mod_proxy-cache/error_log-reverse-proxy" <Location "/app/"> ProxyPass "http://localhost:60081/"; </Location> CacheSocache shmcb CacheSocacheMaxSize 102400 CacheEnable socache "/" CacheHeader on CustomLog "/tmp/apache-rex/mod_proxy-cache/reverse-proxy-uncached.log" cache_format env=cache-miss CustomLog "/tmp/apache-rex/mod_proxy-cache/reverse-proxy-cached.log" cache_format env=cache-hit CustomLog "/tmp/apache-rex/mod_proxy-cache/reverse-proxy-revalidated.log" cache_format env=cache-revalidate </VirtualHost> Listen 60083 <VirtualHost *:60083> ErrorLog "/tmp/apache-rex/mod_proxy-cache/error_log-forward-proxy" ProxyRequests On <Proxy "*"> Require local </Proxy> CacheSocache shmcb CacheSocacheMaxSize 102400 # http://httpd.apache.org/docs/current/mod/mod_cache.html#cacheenable CacheEnable socache http://localhost:60081/ CacheHeader on CustomLog "/tmp/apache-rex/mod_proxy-cache/forward-proxy-uncached.log" cache_format env=cache-miss CustomLog "/tmp/apache-rex/mod_proxy-cache/forward-proxy-cached.log" cache_format env=cache-hit CustomLog "/tmp/apache-rex/mod_proxy-cache/forward-proxy-revalidated.log" cache_format env=cache-revalidate </VirtualHost> ------------------------------>8------------------------------------ And the script runs 10 requests on the server: for i in $(seq 1 10); do curl -s -v --proxy http://localhost:60083/ http://localhost:60081/ 2>&1 | grep 'X-Cache' sleep 0.1 done And again, I cannot reproduce for example with httpd run with fx. -f /tmp/apache-rex/mod_proxy-cache/httpd.conf and running requests manually. I will try harder, I just want to know first whether this is something known or whether I have something completely wrong in the configuration. Thanks for your attention, Petr [1] https://github.com/pgajdos/apache-rex/tree/master/mod_proxy-cache -- Have a lot of fun!
