FANWE Database Error

The database has encountered a problem.

Error messages:

[Type] dbnot_connect [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

Program messages:

[Line: 0017]user.php(FanweService->initialize) [Line: 0174]core/service/fanwe.service.php(FanweService->buildDb) [Line: 0337]core/service/fanwe.service.php(FDbMySql->connect) [Line: 0052]core/class/mysql.class.php(FDbMySql->_dbConnect) [Line: 0062]core/class/mysql.class.php(FDbMySql->halt) [Line: 0233]core/class/mysql.class.php(FanweError->dbError) [Line: 0121]core/class/error.class.php(FanweError->debugBacktrace)