Discuz! info: Can not connect to MySQL server

Time: 2018-10-24 5:38am
Script: /road-trip-grill-road-trip-camping-in-france-t4179.html

Error: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
Errno.: 2002

Similar error report has beed dispatched to administrator before.