Getting 1000s of errors in mails!

[penmai.com]

Hi,
Getting the following error in mails. Let me know how to resolve it.

Database error in vBulletin 4.2.2:

Invalid SQL:

SELECT data, expires, locktime, serialized
FROM vb_cache
WHERE cacheid = '';

MySQL Error :
Error Number :
Request Date : Monday, December 8th 2014 @ 09:52:34 AM
Error Date : Monday, December 8th 2014 @ 09:52:34 AM
Script : http://www.penmai.com/forums/externa...p;forumids=298
Referrer :
IP Address : xxxxxxxxxx
Username : Unregistered
Classname : vB_Database
MySQL Version :

I tried disabling all adons and tried still got the error.

[ForceHSS]

need the mysql error to help

[penmai.com]

Both of this were empty only,
MySQL Error :
Error Number :

[ozzy47]

Check your server error logs. If you don't know where those are, ask your host.

[Dave]

Also take a look at this thread: http://www.vbulletin.com/forum/forum/vbulletin-4/vbulletin-4-questions-problems-and-troubleshooting/411530-4-2-database-errors-on-rss
It's regarding the same SQL error you are receiving.

[penmai.com]

error log file doesn't contain information regarding rss or external.php. Any particular content i need to search in error log.

[ozzy47]

Read through this post, it is most likely the issue, http://www.vbulletin.com/forum/forum/vbulletin-legacy-versions-products/legacy-vbulletin-versions/vbulletin-2-how-do-i-and-troubleshooting/49952-error-2013-but-server-up-for-6-days?s=&postid=310265&p=829758