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=1040

Information:

error message: Connecting to MySQL server 'localhost' failed.
error code: 1040
sql type: MySQLDatabase
sql error: Too many connections
sql error number: 1040
sql version:
file: /home/dolgop/dolgop.pp.ru/wbb4/wcf/lib/system/database/MySQLDatabase.class.php (29)
php version: 5.3.10-1ubuntu3.26
wcf version: 1.0.11 pl 3 (Horizon)
date: Sat, 23 Jun 2018 10:00:40 +0000
request: /wbb4/wbb/index.php?page=Board&boardID=11&pageNo=11
referer:

Stacktrace:

#0 /home/dolgop/dolgop.pp.ru/wbb4/wcf/lib/system/database/Database.class.php(76): MySQLDatabase->connect()
#1 /home/dolgop/dolgop.pp.ru/wbb4/wcf/lib/system/WCF.class.php(270): Database->__construct(...)
#2 /home/dolgop/dolgop.pp.ru/wbb4/wcf/lib/system/WCF.class.php(88): WCF->initDB()
#3 /home/dolgop/dolgop.pp.ru/wbb4/wbb/global.php(18): WCF->__construct()
#4 /home/dolgop/dolgop.pp.ru/wbb4/wbb/index.php(8): require_once('/home/dolgop/do...')
#5 {main}