Misc Database Error
 

Does anyone have any idea as to what this is?

Database error in vBulletin 4.2.5 Beta 4:

Invalid SQL:
SELECT dateline, userid FROM customavatar WHERE userid = 0;

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Wednesday, May 3rd 2017 @ 08:38:15 PM
Error Date : Wednesday, May 3rd 2017 @ 08:39:34 PM
Script : #############/attachment.php?attachmentid=8269&d=1404496272
Referrer :
IP Address : ###########
Username : Unregistered
Classname : vB_Database_MySQLi
MySQL Version :
Server : ###########
User Agent :

Stack Trace:

#0 vB_Database->halt() called in [path]/includes/class_core.php on line 1403
#1 vB_Database_MySQLi->execute_query() called in [path]/includes/class_core.php on line 505
#2 vB_Database->query_first() called in [path]/includes/class_bootstrap.php(433) : eval()'d code on line 96
#3 eval() called in [path]/includes/class_bootstrap.php on line 433
#4 vB_Bootstrap->process_templates() called in [path]/includes/class_core.php on line 4398
#5 vB_Template->__construct() called in [path]/includes/class_core.php on line 4356
#6 vB_Template::create() called in [path]/includes/functions.php on line 3139
#7 construct_navbits() called in [path]/500.php on line 44

Sounds to me like a timeout. Check the wait_timeout and/or max_allowed_packet setting in your MySQL settings file.

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It's rather odd that it tried to select an entry from the customavatar table with the userid 0.

The time out is set ok as is the max packet. They are both set pretty high.

I get these very random errors on occasion so they are not a huge issue but this is still bugging me...

The only changes I have made recently that could possibly be related is the addition of redis cache to my server and I also installed DBtech optimization. Everything else is running fine.. I got 2 of these errors yesterday and one today and traffic has not really been a factor at around 1,600 uniques.. load should not be an issue at all..

Thanks