SSLSessionCache: Error Explanation

The SSLSessionCache error is a common error that may occur while configuring SSL/TLS for your web server. This error is often caused by a missing SSL session cache module in the web server.

When the server starts up, it tries to initialize the SSLSessionCache based on the configuration file. If the session cache is not supported, an error message similar to the following may be displayed:

SSLSessionCache: No support for shmcb session cache

This error message indicates that the server could not find the 'shmcb' session cache module. The server needs this module to function properly.

To fix this error, you may need to load an appropriate socache module. The 'mod_socache_shmcb' module is a popular choice. You can load this module using the following command:

LoadModule socache_shmcb_module modules/mod_socache_shmcb.so

Note that the path to the module may be different in your case. You should use the correct path for your system.

Once the module is loaded, you can configure it in the SSL configuration file using the following line:

SSLSessionCache "shmcb:/path/to/cache/file/ssl_scache(512000)"

Here, /path/to/cache/file/ssl_scache is the path to the cache file, and 512000 is the cache size in bytes.

In summary, if you encounter the SSLSessionCache error, you should check if the 'shmcb' session cache module is installed and load the appropriate socache module if necessary. With the correct configuration, your web server should function properly.