Fatal error: Uncaught PDOException: SQLSTATE[HY000] [2002] Connection refused in /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:128 Stack trace: #0 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php(128): PDO->__construct() #1 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Mysql.php(111): Zend_Db_Adapter_Pdo_Abstract->_connect() #2 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(424): Zend_Db_Adapter_Pdo_Mysql->_connect() #3 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(589): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect() #4 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(627): Magento\Framework\DB\Adapter\Pdo\Mysql->_query() #5 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(828): Magento\Framework\DB\Adapter\Pdo\Mysql->query() #6 /var/www/html/vendor/magento/framework/Session/SaveHandler/DbTable.php(124): Zend_Db_Adapter_Abstract->fetchOne in /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php on line 144