Exception

#0 /www/wwwroot/madouka.com/core/lib/mysql.class.php(28)Controller::halt(Mysql服务器连接失败！ 
Error Message:php_network_getaddresses: getaddrinfo failed: Name or service not known
Error Code:2002.Warning)
#1 /www/wwwroot/madouka.com/core/lib/mysql.class.php(172)mysql->__construct(Array)
#2 /www/wwwroot/madouka.com/core/model.php(39)mysql::getInstance(Array)
#3 /www/wwwroot/madouka.com/core/core.php(234)Model->__construct()
#4 /www/wwwroot/madouka.com/core/controller.php(242)Core::singleton(UserModel)
#5 /www/wwwroot/madouka.com/controller/Common.php(55)Controller::model(user)
#6 /www/wwwroot/madouka.com/controller/IndexController.php(7)Common->__construct()
#7 /www/wwwroot/madouka.com/core/core.php(119)IndexController->__construct()
#8 /www/wwwroot/madouka.com/index.php(19)Core::run()