There has been an error processing your request

SQLSTATE[HY000] [2002] No such file or directory
Trace: #0 /var/www/html/lib/Zend/Db/Adapter/Pdo/Mysql.php(111): Zend_Db_Adapter_Pdo_Abstract->_connect() #1 /var/www/html/lib/Varien/Db/Adapter/Pdo/Mysql.php(320): Zend_Db_Adapter_Pdo_Mysql->_connect() #2 /var/www/html/lib/Zend/Db/Adapter/Abstract.php(460): Varien_Db_Adapter_Pdo_Mysql->_connect() #3 /var/www/html/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('SET NAMES utf8', Array) #4 /var/www/html/lib/Varien/Db/Adapter/Pdo/Mysql.php(428): Zend_Db_Adapter_Pdo_Abstract->query('SET NAMES utf8', Array) #5 /var/www/html/app/code/core/Mage/Core/Model/Resource.php(179): Varien_Db_Adapter_Pdo_Mysql->query('SET NAMES utf8') #6 /var/www/html/app/code/core/Mage/Core/Model/Resource.php(110): Mage_Core_Model_Resource->_newConnection('pdo_mysql', Array) #7 /var/www/html/app/code/local/Amasty/Fpc/Model/Fpc/Front.php(999): Mage_Core_Model_Resource->getConnection('core_read') #8 /var/www/html/app/code/local/Amasty/Fpc/Model/Fpc/Front.php(108): Amasty_Fpc_Model_Fpc_Front->getDbConfig('web/url/use_sto...') #9 /var/www/html/app/code/core/Mage/Core/Model/Cache.php(703): Amasty_Fpc_Model_Fpc_Front->__construct() #10 /var/www/html/app/code/core/Mage/Core/Model/Cache.php(685): Mage_Core_Model_Cache->_getProcessor('Amasty_Fpc_Mode...') #11 /var/www/html/app/code/core/Mage/Core/Model/App.php(340): Mage_Core_Model_Cache->processRequest() #12 /var/www/html/app/Mage.php(686): Mage_Core_Model_App->run(Array) #13 /var/www/html/index.php(87): Mage::run('', 'store') #14 {main}

Error log record number: 319924189041