php_network_getaddresses: getaddrinfo failed: 　返回首页

FILE: D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Db\Driver\Mysql.class.php 　LINE: 55

#0 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Db\Driver\Mysql.class.php(55): E('php_network_get...')
#1 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Db.class.php(166): Think\Db\Driver\Mysql->connect()
#2 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Db\Driver\Mysql.class.php(92): Think\Db->initConnect(false)
#3 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Db\Driver\Mysql.class.php(211): Think\Db\Driver\Mysql->query('SHOW COLUMNS FR...')
#4 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Model.class.php(130): Think\Db\Driver\Mysql->getFields('cms_site')
#5 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Model.class.php(118): Think\Model->flush()
#6 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Model.class.php(1300): Think\Model->_checkTableInfo()
#7 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Model.class.php(95): Think\Model->db(0, '', true)
#8 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Common\functions.php(552): Think\Model->__construct('site', '', '')
#9 D:\wwwroot\chinadhbio_451la8\web\Hanapp\Hanhome\Controller\IndexController.class.php(10): M('site')
#10 [internal function]: Hanhome\Controller\IndexController->index()
#11 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\App.class.php(154): ReflectionMethod->invoke(Object(Hanhome\Controller\IndexController))
#12 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\App.class.php(192): Think\App::exec()
#13 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Library\Think\Think.class.php(120): Think\App::run()
#14 D:\wwwroot\chinadhbio_451la8\web\Hanbang\Hanbang.php(98): Think\Think::start()
#15 D:\wwwroot\chinadhbio_451la8\web\index.php(16): require('D:\\wwwroot\\chin...')
#16 {main}