Cannot load /etc/httpd/modules/mod_file_cache.so into server: /etc/httpd/modules/mod_file_cache.so:

Stopping httpd:                                            [FAILED]
Starting httpd: httpd: Syntax error on line 73 of /etc/httpd/conf/httpd.conf: Cannot load /etc/httpd/modules/mod_file_cache.so into server: /etc/httpd/modules/mod_file_cache.so: cannot open shared object file: No such file or directory
                                                           [FAILED]
This is usually because the file is not found in the expected location.   This often happens when moving an httpd.conf between different servers and versions of Apache.  I

In this case for some reason in a newer version of Apache the module mod_file_cache.so is missing.

In the case of Centos/RHEL 5 it was, but in RHEL/Centos 6 mod_file_cache is missing according to this from the RHEL website:

4.4. Apache HTTP Server

Below is a list of changes for the Apache HTTP Server that are noteworthy when migrating to Red Hat Enterprise Linux 6:
  • The mod_file_cache, mod_mem_cache, and mod_imagemap modules are no longer supported.

The Solution/Replacement

mod_disk_cache or mod_cache

It is as simple as the following in httpd.conf

CacheEnable disk /
 

This significantly improves the load times especially when Apache is using ProxyPass as a proxy server in front of the real host.


Tags:

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