Fatal error: Uncaught PDOException: SQLSTATE[HY000] [2002] Connection refused in /www/web/develop/fecshop/vendor/yiisoft/yii2/db/Connection.php:686 Stack trace: #0 /www/web/develop/fecshop/vendor/yiisoft/yii2/db/Connection.php(686): PDO->__construct('mysql:host=127....', 'root', 'Zhaoyong2017fds...', NULL) #1 /www/web/develop/fecshop/vendor/yiisoft/yii2/db/Connection.php(612): yii\db\Connection->createPdoInstance() #2 /www/web/develop/fecshop/vendor/yiisoft/yii2/db/Connection.php(995): yii\db\Connection->open() #3 /www/web/develop/fecshop/vendor/yiisoft/yii2/db/Connection.php(982): yii\db\Connection->getMasterPdo() #4 /www/web/develop/fecshop/vendor/yiisoft/yii2/db/Command.php(253): yii\db\Connection->getSlavePdo() #5 /www/web/develop/fecshop/vendor/yiisoft/yii2/db/Command.php(1140): yii\db\Command->prepare(true) #6 /www/web/develop/fecshop/vendor/yiisoft/yii2/db/Command.php(396): yii\db\Command->queryInternal('fetchAll', NULL) #7 /www/web/develop/fecshop/common/config/bootstrap.php(28): yii\db\Command->queryAll() #8 /www in /www/web/develop/fecshop/vendor/yiisoft/yii2/db/Connection.php on line 623