[Solved] [help] Suddenly get: php_network_getaddresses: getaddrinfo failed: No such host is known.

cocomang

After 8 month without any problems my forum suddenly says:

Something has gone wrong. (We've run into a problem and are unable to handle this request right now.
Please check back in a little while).

I did not change anything, the site was still running at 2014-11-17 19:12:48
I set the debug to TRUE and get the detail error message:

Fatal Error in Gdn_Database.Connection();

An error occurred while attempting to connect to the database
SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: No such host is known.
The error occurred on or near: E:...\wwwroot\forum\library\database\class.database.php:

        63:                     
        64:             if ($Timeout)
        65:                throw new Exception(ErrorMessage('Timeout while connecting to the database', $this->ClassName, 'Connection', $ex->getMessage()), 504);
        66:             
        67:             trigger_error(ErrorMessage('An error occurred while attempting to connect to the database', $this->ClassName, 'Connection', $ex->getMessage()), E_USER_ERROR);
        68:          }
        69:       }
        70:       
        71:       return $this->_Connection;

Backtrace:

    E:\...\wwwroot\forum\library\database\class.database.phpPHP::Gdn_ErrorHandler();
    [E:\...\wwwroot\forum\library\database\class.database.php:67] PHP::trigger_error();
    [E:\...\wwwroot\forum\library\database\class.database.php:297] Gdn_Database->Connection();
    [E:\...\wwwroot\forum\library\database\class.sqldriver.php:1650] Gdn_Database->Query();
    [E:\...\wwwroot\forum\library\database\class.sqldriver.php:674] Gdn_SQLDriver->Query();
    [E:\...\wwwroot\forum\applications\dashboard\models\class.permissionmodel.php:524] Gdn_SQLDriver->Get();
    [E:\...\wwwroot\forum\applications\dashboard\models\class.permissionmodel.php:235] PermissionModel->PermissionColumns();
    [E:\...\wwwroot\forum\applications\dashboard\models\class.usermodel.php:786] PermissionModel->CachePermissions();
    [E:\...\wwwroot\forum\library\core\class.session.php:357] UserModel->DefinePermissions();
    [E:\...\wwwroot\forum\library\core\class.auth.php:41] Gdn_Session->Start();
    [E:\...\wwwroot\forum\bootstrap.php:207] Gdn_Auth->StartAuthenticator();
    [E:\...\wwwroot\forum\index.php:33] PHP::require_once();

Additional information for support personnel:

    Application: Vanilla
    Application Version: 2.1.3
    PHP Version: 5.3.26
    Operating System: WINNT
    Server Software: Microsoft-IIS/8.0
    User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0
    Request Uri: /forum/
    Controller: Gdn_Database
    Method: Connection

Any idea what could go wrong and what I should do in this case?

Bleistivt

This has nothing to do with Vanilla but with your server setup, Vanilla can't connect to the database anymore.

Check with your hosting provider for database credentials and correct it in you config.php if it has changed.

cocomang

You are right!
This was about the mysql server at my hosting provider that they had to restart.

Thanks Bleistivt for your answer.