"Database error in vBulletin :" ?

[asimo]

(how do i make paragraphs here?) Hi I am using 4.2.0 Patch Level 3 . Today I got a lot of these errors , what could be the issue? Thanks for the replies
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mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (11) /home/user/public_html/site.com/forum/includes/class_core.php on line 317 .
MySQL Error : Error Number : Request Date : Thursday, March 27th 2014 @ 03:48:45 AM Error Date : Thursday, March 27th 2014 @ 03:48:45 AM Script : site.com/forum/archive/index.php/t-855.html Referrer : IP Address : 157.56.39.100 Username : Classname : vB_Database MySQL Version : .

[Mark.B]

"Can't connect to local MySQL server"

This is a server error, and you should contact your host.