[Forum] Fatal error: Xcache not installed in [path]/includes/class_datastore.php on line 528

[djbaxter]

Just moved to a new server. Had xcache installed previously. NOT installed on new server.

vBulletin Suite 4.2.0 PL3 with latest vBSEO.

Cannot load the forum or the AdminCP because in both cases I get the error:

Fatal error: Xcache not installed in [path]/includes/class_datastore.php on line 528

From config.php:

    // ****** DATASTORE CACHE CONFIGURATION *****
    // Here you can configure different methods for caching datastore items.
    // vB_Datastore_Filecache  - to use includes/datastore/datastore_cache.php
    // vB_Datastore_APC - to use APC
    // vB_Datastore_XCache - to use XCache
    // vB_Datastore_Memcached - to use a Memcache server, more configuration below
$config['Datastore']['class'] = 'vB_Datastore_Filecache';

    // ******** DATASTORE PREFIX ******
    // If you are using a PHP Caching system (APC, XCache, eAccelerator) with more
    // than one set of forums installed on your host, you *may* need to use a prefix
    // so that they do not try to use the same variable within the cache.
    // This works in a similar manner to the database table prefix.
// $config['Datastore']['prefix'] = '';

    // It is also necessary to specify the hostname or IP address and the port the server is listening on
/*
$config['Datastore']['class'] = 'vB_Datastore_Memcached';
$i = 0;
// First Server
$i++;
$config['Misc']['memcacheserver'][$i]        = '127.0.0.1';
$config['Misc']['memcacheport'][$i]            = 11211;
$config['Misc']['memcachepersistent'][$i]    = true;
$config['Misc']['memcacheweight'][$i]        = 1;
$config['Misc']['memcachetimeout'][$i]        = 1;
$config['Misc']['memcacheretry_interval'][$i] = 15;
*/ 

Using vBSEO but Xcache disabled in vBSEO as well using the config file.

Tried disabling hooks - no change.

How do I access the forum and get around this error? And why is the error even occurring?

- - - Updated - - -

Update:

Tried again to disable hooks using

define('DISABLE_HOOKS', true); 

in config.php

This time I was able to load the forum and enter the AdminCP.

I cleared the datastore by disabling and then enabling one of the installed plugins.

Removed the disable_hooks line from config.php

Forum is now accessible and working normally.

Very weird....

[Amaury]

Have you checked your error logs?

If you don't know how, contact your host.

[BirdOPrey5]

As the OP has figured out this error was due to the datastore not being refreshed. In the future if anyone is moving a site from a server with xcache to a server without, you should disable xcache and refresh the data store BEFORE making the database copy to move.

[Dennis B]

This problem is back for XCache > 3.0.0 since it's now installed as a PHP extension and not a Zend extension anymore.