升级后显示这么个情况，开网页和后台都是数据库连接失败2

从5.6升级到5.7
升级前一定要备份文件和数据库！！！



连接数据库服务器成功! √
打开指定数据库成功! √
更新config文件结构成功! √
更新config配置成功! √
Warning: mysqli::mysqli() [mysqli.mysqli]: (HY000/2005): Unknown MySQL server host "hdm-081.hichina.com:3306" (1) in/data/home/hyu1286170001/htdocs/lib/inc/dbmysqli.php on line 32
数据库连接失败2!
Warning: mysqli_close() [function.mysqli-close]: Couldn"t fetch mysqli in/data/home/hyu1286170001/htdocs/lib/inc/dbmysqli.php on line 103,1505875550,1505887342,2779,1,1,576,2,0,0,1,0,0,0,0,NULL,0,979752360,1207,4.7596678446896,1551688676,0,0,0,2131932423 2617431034 2477320917 3259339029 2151821488 3711726159 259682545424211 3683025509 2283336133,0,NULL,NULL,NULL,0