Unknown MySQL server host 'bdm207399307.my3w.com' (1)

FILE: /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Core/Db.class.php 　LINE: 168

[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Core/Db.class.php (168) DbMysql->connect(Unknown MySQL server host 'bdm207399307.my3w.com' (1))
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Driver/Db/DbMysql.class.php (96) Db->initConnect()
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Driver/Db/DbMysql.class.php (215) DbMysql->query()
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Core/Model.class.php (135) DbMysql->getFields(SHOW COLUMNS FROM `y_config`)
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Core/Model.class.php (123) Model->flush(y_config)
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Core/Model.class.php (1155) Model->_checkTableInfo()
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Core/Model.class.php (98) Model->db()
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Common/common.php (379) Model->__construct(0, )
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/home/Lib/Action/Public.php (3) M()
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/home/Lib/Action/YanjiuAction.class.php (60) require(/usr/home/byu2141640001/htdocs/home/Lib/Action/Public.php)
[24-05-08 13:47:05] () YanjiuAction->shownews(config, , )
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Core/App.class.php (169) ReflectionMethod->invoke(config)
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Core/App.class.php (205) App::exec()
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Lib/Core/Think.class.php (39) App::run()
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/Common/runtime.php (243) Think::start()
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/ThinkPHP/ThinkPHP.php (30) require(/usr/home/byu2141640001/htdocs/ThinkPHP/Common/runtime.php)
[24-05-08 13:47:05] /usr/home/byu2141640001/htdocs/index.php (7) require(/usr/home/byu2141640001/htdocs/ThinkPHP/ThinkPHP.php)