Antivirus failing to start in scripted restart
I use the "Simple Shell Script" backup method, which among other things stops Zimbra services at night while doing a rsync of the files, then restarts them. We've had to mess with the syntax a few times since I first wrote the script due to some changes in Zimbra code; at present my stop and start commands in the script are:
Since I have upgraded to 5.0.18 almost two weeks ago I have had it stop and restart successfully most days, but three times (last night being the third), antivirus services failed to start, resulting in a frozen mail queue. All three times, a manual stop and restart (plain-vanilla zmcontrol stop and zmcontrol start as Zimbra user) has brought everything back up with no errors, and the deferred mail scans and comes through.
su - zimbra -c "/opt/zimbra/bin/zmcontrol stop"
su - zimbra -c "/opt/zimbra/bin/zmcontrol start"
Thinking the scripting might be the problem, I just tried running a stop and start from script (as root, not as Zimbra user) and everything restarted just fine this way too. I guess that shouldn't be a surprise since 10 times out of 13 it was fine overnight too.
I'm at a loss to know where to look for problems on this. /var/log/zimbra.log shows that antivirus never successfully started after last night's restart, but I can't actually find a reason. I hesitate to post the whole log, as it has ip addresses and email addresses I'd rather not have out in the public. However, if anyone can tell me specific entries I should look for/post, I can obfuscate them and put them up. Other debugging methods welcome too.
Thanks in advance. . .