EX: string(105) "SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)"

TRACE: string(1891) "#0 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/library/lib/Zend_Framework/library/Zend/Db/Adapter/Pdo/Mysql.php(96): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/library/lib/Zend_Framework/library/Zend/Db/Adapter/Abstract.php(448): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/library/lib/Zend_Framework/library/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query(Object(Zend_Db_Select), Array)
#3 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/library/lib/Zend_Framework/library/Zend/Db/Select.php(686): Zend_Db_Adapter_Pdo_Abstract->query(Object(Zend_Db_Select))
#4 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/library/lib/GPLib/Application/Bootstrap/Bootstrap.php(282): Zend_Db_Select->query()
#5 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/library/lib/Zend_Framework/library/Zend/Application/Bootstrap/BootstrapAbstract.php(666): GPLib_Application_Bootstrap_Bootstrap->_initMenu()
#6 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/library/lib/Zend_Framework/library/Zend/Application/Bootstrap/BootstrapAbstract.php(619): Zend_Application_Bootstrap_BootstrapAbstract->_executeResource('menu')
#7 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/library/lib/Zend_Framework/library/Zend/Application/Bootstrap/BootstrapAbstract.php(583): Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap(NULL)
#8 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/library/lib/Zend_Framework/library/Zend/Application.php(355): Zend_Application_Bootstrap_BootstrapAbstract->bootstrap(NULL)
#9 /home/vesuviana.it/domains/servizi2.vesuviana.it/public_html/demo/public/index.php(27): Zend_Application->bootstrap()
#10 {main}"