Exception

#0 /data/home/hmu053070/htdocs/core/lib/mysql.class.php(21)Controller::halt(Mysql服务器(hdm106787216.my3w.com)连接失败 
Error Message:Unknown MySQL server host 'hdm106787216.my3w.com' (1)
Error Code:2005.Warning)
#1 /data/home/hmu053070/htdocs/core/lib/mysql.class.php(157)mysql->__construct(Array)
#2 /data/home/hmu053070/htdocs/core/Model.php(29)mysql::getInstance(Array)
#3 /data/home/hmu053070/htdocs/core/App.php(382)Model->__construct()
#4 /data/home/hmu053070/htdocs/core/Controller.php(293)App::singleton(CategoryModel)
#5 /data/home/hmu053070/htdocs/controllers/Common.php(43)Controller::model(category)
#6 /data/home/hmu053070/htdocs/controllers/ContentController.php(6)Common->__construct()
#7 /data/home/hmu053070/htdocs/core/App.php(146)ContentController->__construct()
#8 /data/home/hmu053070/htdocs/index.php(19)App::run(Array)