How do I start debugging this?

[outlyer]

I get an error like this each night (around 1:10):

 

Subject: Cron <root@myserver> ionice -c3 nice /usr/bin/php5 -q /var/www/froxlor/scripts/froxlor_master_cronjob.php

"We are sorry, but a MySQL - error occurred. The administrator may find more information in syslog with the ID e22d52a5a11b60be39fd92935d268d42"

 

The logged message isn't helping:

 

# zgrep e22d52a5a11b60be39fd92935d268d42 /var/log/syslog.*
/var/log/syslog.1:Aug 11 01:20:01 myserver Froxlor: MySQL - Error: Establishing connection failed, exiting; ErrNo: 0; Desc: ; Script: ; Ref: ; e22d52a5a11b60be39fd92935d268d42

 

When I had enabled (but not configured) APS I got errors like this every 5 or 10 minutes (can't remember how often the cronjob runs). Since I disabled it, I'm getting it once a day.

 

I haven't noticed anything failing. The only things that aren't working quite right are awstats (suexec permissions woes) and Web-FTP upload (file-permissions?)

 

How do I discover what's the culprit?