SQLSTATE[HY000] [2005] Unknown MySQL server host 'bdm301583693.my3w.com' (1)

FILE: /usr/home/byu3027820001/htdocs/Include/Library/Think/Db/Driver.class.php 　LINE: 109

#0 /usr/home/byu3027820001/htdocs/Include/Library/Think/Db/Driver.class.php(109): E('SQLSTATE[HY000]...')
#1 /usr/home/byu3027820001/htdocs/Include/Library/Think/Db/Driver.class.php(1054): Think\Db\Driver->connect()
#2 /usr/home/byu3027820001/htdocs/Include/Library/Think/Db/Driver/Mysql.class.php(50): Think\Db\Driver->initConnect(true)
#3 /usr/home/byu3027820001/htdocs/Include/Library/Think/Model.class.php(134): Think\Db\Driver\Mysql->getFields('kl_category_acc...')
#4 /usr/home/byu3027820001/htdocs/Include/Library/Think/Model.class.php(122): Think\Model->flush()
#5 /usr/home/byu3027820001/htdocs/Include/Library/Think/Model.class.php(1432): Think\Model->_checkTableInfo()
#6 /usr/home/byu3027820001/htdocs/Include/Library/Think/Model.class.php(97): Think\Model->db(0, '', true)
#7 /usr/home/byu3027820001/htdocs/Include/Common/functions.php(590): Think\Model->__construct('categoryAccess', '', '')
#8 /usr/home/byu3027820001/htdocs/App/Home/Controller/ShowController.class.php(53): M('categoryAccess')
#9 [internal function]: Home\Controller\ShowController->index()
#10 /usr/home/byu3027820001/htdocs/Include/Library/Think/App.class.php(164): ReflectionMethod->invoke(Object(Home\Controller\ShowController))
#11 /usr/home/byu3027820001/htdocs/Include/Library/Think/App.class.php(202): Think\App::exec()
#12 /usr/home/byu3027820001/htdocs/Include/Library/Think/Think.class.php(120): Think\App::run()
#13 /usr/home/byu3027820001/htdocs/Include/ThinkPHP.php(97): Think\Think::start()
#14 /usr/home/byu3027820001/htdocs/index.php(24): require('/usr/home/byu30...')
#15 {main}