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Wikimedia\Rdbms\DBConnectionError from line 1420 of /www/wwwroot/mediawiki-1.35test/includes/libs/rdbms/loadbalancer/LoadBalancer.php: Cannot access the database: Unknown error (localhost)
#0 /www/wwwroot/mediawiki-1.35test/includes/libs/rdbms/loadbalancer/LoadBalancer.php(934): Wikimedia\Rdbms\LoadBalancer->reportConnectionError()
#1 /www/wwwroot/mediawiki-1.35test/includes/libs/rdbms/loadbalancer/LoadBalancer.php(901): Wikimedia\Rdbms\LoadBalancer->getServerConnection(0, 'test_chuangqie_...', 4)
#2 /www/wwwroot/mediawiki-1.35test/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1046): Wikimedia\Rdbms\LoadBalancer->getConnection(-2, Array, 'test_chuangqie_...', 4)
#3 /www/wwwroot/mediawiki-1.35test/maintenance/includes/Maintenance.php(1368): Wikimedia\Rdbms\LoadBalancer->getMaintenanceConnectionRef(-2, Array, 'test_chuangqie_...')
#4 /www/wwwroot/mediawiki-1.35test/maintenance/update.php(141): Maintenance->getDB(-2)
#5 /www/wwwroot/mediawiki-1.35test/maintenance/doMaintenance.php(107): UpdateMediaWiki->execute()
#6 /www/wwwroot/mediawiki-1.35test/maintenance/update.php(253): require_once('/www/wwwroot/me...')

解决方法：

方法一：

国外网站解决方法：

 

 方案二：

我自己的解决方法：

find / -name mysql.sock

 

 在LocalSettings.php上加上如下代码：

$wgDBserver = "localhost:/tmp/mysql.sock";