Fatal error: Uncaught PDOException: SQLSTATE[HY000] [2002] Connection refused in /www/wwwroot/cscap.cn/edusoho/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:43 Stack trace: #0 /www/wwwroot/cscap.cn/edusoho/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(43): PDO->__construct('mysql:host=127....', 'cscap_cn', '2ir6zDaSZRs5ARN...', Array) #1 /www/wwwroot/cscap.cn/edusoho/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php(44): Doctrine\DBAL\Driver\PDOConnection->__construct('mysql:host=127....', 'cscap_cn', '2ir6zDaSZRs5ARN...', Array) #2 /www/wwwroot/cscap.cn/edusoho/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(360): Doctrine\DBAL\Driver\PDOMySql\Driver->connect(Array, 'cscap_cn', '2ir6zDaSZRs5ARN...', Array) #3 /www/wwwroot/cscap.cn/edusoho/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(833): Doctrine\DBAL\Connection->connect() #4 /www/wwwroot/cscap.cn/edusoho/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(510): Doctrine\DBAL\Connection->executeQuery(' in /www/wwwroot/cscap.cn/edusoho/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php on line 103