Fatal error: Connecting to MySQL server 'localhost' failed.

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=1135

Information:

error message: Connecting to MySQL server 'localhost' failed.
error code: 1135
sql type: MySQLDatabase
sql error: Can't create a new thread (errno 11 "Resource temporarily unavailable"); if you are not out of available memory, you can consult the manual for a possible OS-dependent bug
sql error number: 1135
sql version:
file: /srv/www/forum.aquacomputer.de/htdocs/wcf/lib/system/database/MySQLDatabase.class.php (29)
php version: 5.5.14
wcf version: 1.0.11 pl 3 (Horizon)
date: Sat, 06 Dec 2025 18:52:02 +0000
request: /index.php?l=2&page=Thread&postID=929252
referer:

Stacktrace:

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