Couple of errors after upgrade...

[one.]

So I've received a couple of errors in email after upgrading. I fixed a few things, but maybe not all. I followed the upgrade process step by step, no errors or anything. I'm stating that because one of my errors is a 3.5.5 error.

This has popped up a couple of times:
Database error in vBulletin :

mysql_connect(): Can't connect to local  MySQL server through socket '/var/lib/mysql/mysql.sock'  (2)
/home/dseries2/public_html/forums/includes/class_core.php on line  271

MySQL Error  : 
Error Number : 
Date         : Saturday,  October 14th 2006 @ 09:19:13 PM 

I think that's a server disconnect of some sort, but I am getting it more frequently now.

Also:

Database error in vBulletin 3.6.2:

Invalid SQL:
SELECT  *
                          FROM user AS user 
                           LEFT JOIN customfile AS customfile ON (customfile.userid =  user.userid)
          LEFT JOIN userfield AS userfield ON (userfield.userid  = user.userid)
                          WHERE user.userid =  userfield.userid
                           AND userfield.field55>0    
                          ORDER BY userfield.field55  ASC
                          LIMIT 0,25;

MySQL Error  : Table  'dseries2_database.customfile' doesn't exist
Error Number :  1146
Date         : Saturday, October 14th 2006 @ 12:42:26 AM
Script        : http://www.d-series.org/forums/timeslips.php?
Referrer      : http://www.d-series.org/forums//showthread.php?t=53202 

And this:

Database error in vBulletin 3.5.5:

Invalid SQL:

SELECT  moderator.*, user.username,
IF(user.displaygroupid = 0, user.usergroupid,  user.displaygroupid) AS displaygroupid, infractiongroupid
FROM moderator AS  moderator
INNER JOIN user AS user USING(userid);

MySQL Error  :  Unknown column 'infractiongroupid' in 'field list'
Error Number :  1054
Date         : Friday, October 13th 2006 @ 08:47:04 AM
Script       :  http://d-series.org/
Referrer     : 
IP  Address   : 205.188.116.72
Username     : Unregistered
Classname    :  vb_database 

Any and all help is greatly appreciated.

Thanks.

[Jake Bunce]

The first error is a failed MySQL connection. Maybe the config info was wrong for a short time during the upgrade while you were working with the files. Or maybe the MySQL server was restarted. I wouldn't worry about it unless the error recurs.

The second error refers to a table named customfile which does not exist in the default software. This must be from custom code. Upload the original PHP files and disable plugins.

The third error refers to a column which does not exist in 3.5 (the version reported in the error), but it does in 3.6. This might have happened during the upgrade when the new files were uploaded but the database was not yet upgraded (before running the upgrade script). Are you still getting this error?