An exception occured while bootstrapping the application.

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Stack Trace:
#0 /var/www/library/Zend/Db/Adapter/Abstract.php(414): Zend_Db_Adapter_Mysqli->_connect()
#1 /var/www/wueste-welle.de/framework/application/bootstrap.php(1023): Zend_Db_Adapter_Abstract->query('SELECT  id, par...')
#2 /var/www/wueste-welle.de/htdocs/index.php(15): require('/var/www/wueste...')
#3 {main}