A fatal error has occurred

Could not instantiate PDO. PDOException: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known

in /usr/share/php/Horde/Db/Adapter/Pdo/Base.php:55
 1. Horde_Injector->getInstance() /www/wwwroot/mail.onlineplumber.in/horde/admin/groups.php:20
 2. Horde_Injector->createInstance() /usr/share/php/Horde/Injector.php:272
 3. Horde_Injector_Binder_Factory->create() /usr/share/php/Horde/Injector.php:238
 4. Horde_Core_Factory_Group->create() /usr/share/php/Horde/Injector/Binder/Factory.php:119
 5. Horde_Core_Factory_Db->create() /usr/share/php/Horde/Core/Factory/Group.php:40
 6. Horde_Core_Factory_Db->create() /usr/share/php/Horde/Core/Factory/Db.php:103
 7. Horde_Core_Factory_Db->_createDb() /usr/share/php/Horde/Core/Factory/Db.php:106
 8. Horde_Db_Adapter_Base->__construct() /usr/share/php/Horde/Core/Factory/Db.php:189
 9. Horde_Db_Adapter_Pdo_Mysql->connect() /usr/share/php/Horde/Db/Adapter/Base.php:164
10. Horde_Db_Adapter_Pdo_Base->connect() /usr/share/php/Horde/Db/Adapter/Pdo/Mysql.php:68

Details

The full error message is logged in Horde's log file, and is shown below only to administrators. Non-administrative users will not see error details.

Horde_Db_Exception Object
(
    [details] => 
    [logged] => 1
    [_logLevel:protected] => 0
    [message:protected] => Could not instantiate PDO. PDOException: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known
    [string:Exception:private] => 
    [code:protected] => 0
    [file:protected] => /usr/share/php/Horde/Db/Adapter/Pdo/Base.php
    [line:protected] => 55
    [trace:Exception:private] => Array
        (
            [0] => Array
                (
                    [file] => /usr/share/php/Horde/Db/Adapter/Pdo/Mysql.php
                    [line] => 68
                    [function] => connect
                    [class] => Horde_Db_Adapter_Pdo_Base
                    [type] => ->
                )

            [1] => Array
                (
                    [file] => /usr/share/php/Horde/Db/Adapter/Base.php
                    [line] => 164
                    [function] => connect
                    [class] => Horde_Db_Adapter_Pdo_Mysql
                    [type] => ->
                )

            [2] => Array
                (
                    [file] => /usr/share/php/Horde/Core/Factory/Db.php
                    [line] => 189
                    [function] => __construct
                    [class] => Horde_Db_Adapter_Base
                    [type] => ->
                )

            [3] => Array
                (
                    [file] => /usr/share/php/Horde/Core/Factory/Db.php
                    [line] => 106
                    [function] => _createDb
                    [class] => Horde_Core_Factory_Db
                    [type] => ->
                )

            [4] => Array
                (
                    [file] => /usr/share/php/Horde/Core/Factory/Db.php
                    [line] => 103
                    [function] => create
                    [class] => Horde_Core_Factory_Db
                    [type] => ->
                )

            [5] => Array
                (
                    [file] => /usr/share/php/Horde/Core/Factory/Group.php
                    [line] => 40
                    [function] => create
                    [class] => Horde_Core_Factory_Db
                    [type] => ->
                )

            [6] => Array
                (
                    [file] => /usr/share/php/Horde/Injector/Binder/Factory.php
                    [line] => 119
                    [function] => create
                    [class] => Horde_Core_Factory_Group
                    [type] => ->
                )

            [7] => Array
                (
                    [file] => /usr/share/php/Horde/Injector.php
                    [line] => 238
                    [function] => create
                    [class] => Horde_Injector_Binder_Factory
                    [type] => ->
                )

            [8] => Array
                (
                    [file] => /usr/share/php/Horde/Injector.php
                    [line] => 272
                    [function] => createInstance
                    [class] => Horde_Injector
                    [type] => ->
                )

            [9] => Array
                (
                    [file] => /www/wwwroot/mail.onlineplumber.in/horde/admin/groups.php
                    [line] => 20
                    [function] => getInstance
                    [class] => Horde_Injector
                    [type] => ->
                )

        )

    [previous:Exception:private] => 
)