宝塔rds 出现下列错误， PDO::__construct(): [2002] Connection timed o...

Warning: PDO::__construct(): [2002] Connection timed out (trying to connect via tcp://rds250986ot319mt8n79.mysql.rds.aliyuncs.com:3306) in /www/wwwroot/weixin.shiba.com/framework/class/db.class.php on line 55 Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002] Connection timed out' in /www/wwwroot/weixin.shiba.com/framework/class/db.class.php:55 Stack trace: #0 /www/wwwroot/weixin.shiba.com/framework/class/db.class.php(55): PDO->__construct('mysql:dbname=we...', 'hang', 'RO0', Array) #1 /www/wwwroot/weixin.shiba.com/framework/class/db.class.php(25): DB->connect('master') #2 /www/wwwroot/weixin.shiba.com/framework/function/pdo.func.php(22): DB->__construct('master') #3 /www/wwwroot/weixin.shiba.com/framework/function/pdo.func.php(36): pdo() #4 /www/wwwroot/weixin.shiba.com/framework/function/cache.mysql.func.php(13): pdo_fetchcolumn('SELECT `value` ...', Array) #5 /www/wwwroot/weixin.shiba.com/framework/function/cache.func.php(31): cache_read('setting') #6 /www/wwwroot/weixin.shiba.com/framework/model/setting.mod.php(35): cache_load('setting') #7 /www/wwwroot/weixin.shiba.com/framework/bootstrap.inc.php(125): setting_load() #8 /www/wwwroot/weixin.shiba.com/ in /www/wwwroot/weixin.shiba.com/framework/class/db.class.php on line 55

你阿里云的RDS数据库挂了吧