Is This Normal ? Database error

[blitzkrieg4ever]

hi...

sometimes when i check my webmail i found mail it contain

Database error in vBulletin 3.6.8:

Invalid SQL:

SELECT rssfeed.*, rssfeed.options AS rssoptions, user.*, forum.forumid
FROM rssfeed AS rssfeed
INNER JOIN user AS user ON (user.userid = rssfeed.userid)
INNER JOIN forum AS forum ON (forum.forumid = rssfeed.forumid)
WHERE rssfeed.options & 1;

MySQL Error : MySQL server has gone away
Error Number : 2006
Date : Wednesday, November 19th 2008 @ 04:18:50 AM
Script : http://www.psphorizon.com/forums/cron.php?rand=485283
Referrer : http://www.psphorizon.com/forums/index.php
IP Address : ************
Username : Unregistered
Classname : vB_Database


thx