Fatal error: Connecting to MySQL server 'basilien.mysql.db.internal' failed.

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=2002

Information:

error message: Connecting to MySQL server 'basilien.mysql.db.internal' failed.
error code: 2002
sql type: MySQLDatabase
sql error: php_network_getaddresses: getaddrinfo failed: hostname nor servname provided, or not known
sql error number: 2002
sql version:
file: /home/niggli/www/basiliensis/forum/board/wcf/lib/system/database/MySQLDatabase.class.php (29)
php version: 5.6.32
wcf version: 1.0.11 pl 4 (Horizon)
date: Fri, 15 Dec 2017 12:07:10 +0000
request: /forum/board/
referer:

Stacktrace:

#0 /home/niggli/www/basiliensis/forum/board/wcf/lib/system/database/Database.class.php(76): MySQLDatabase->connect()
#1 /home/niggli/www/basiliensis/forum/board/wcf/lib/system/WCF.class.php(270): Database->__construct(...)
#2 /home/niggli/www/basiliensis/forum/board/wcf/lib/system/WCF.class.php(88): WCF->initDB()
#3 /home/niggli/www/basiliensis/forum/board/global.php(18): WCF->__construct()
#4 /home/niggli/www/basiliensis/forum/board/index.php(7): require_once('/home/niggli/ww...')
#5 {main}