[cisco-voip] Connection Bug (can cuase message loss)

[Pawlowski, Adam]

Good morning all,


I'm currently working with TAC trying to resolve an issue with our Unity Connection HA cluster, and it looks like we've narrowed it down to a couple of bugs.

Saved messages are broken/missing at random on one appliance or the other. The impacted message volume seems to be sort of low but I wanted to throw this out there to the group as a heads up.


So far it seems that this bug:

UC - "Validate Connection Location Passwords" Task Breaks Update Database Statistics Task w/Cluster
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvf68427

causes us maybe to hit this bug:

Task "Clean Orphaned Message Stream Files" deletes the Message Stream files due to DB exceptions.
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvh02121

Why that second one is marked "moderate" I don't know, I consider this to be a bit more concerning than that given the purpose of the appliance.

Since an indicator of this is either that there's an issue with the Connection tasks, which don't seem to alert the administrator that there has been a problem - or that you attempt to listen to a saved message and it's not available,  I figured if anyone can get a  heads up and catch this on their system either before it happens by patching out or working around, or find out before the users do, that would be very valuable. In our case since we have this issue on both nodes in the cluster, the workaround to push the database from one to the other won't work. We keep a weeks' worth of DRF backups for system recovery only so I am not sure we'll be able to fix this and recover messages between the two hosts.

I noticed this as we have deployed Jabber MRA only, and the clients were getting punted from Expressway - Jabber tries to pull the attachment and it generates a 400 error which trips the edge protection. The engineers working this case indicate they're still investigating root cause.

It does say the message is not available through the TUI when you try and play it back, but, due to the way that some of our users seem to use their connection box as an infinity filing cabinet, they must not dig back often to old mail and haven't reported the problem. I'm just the administrator/sucker with 150 saved mails in my mailbox, and I have this problem myself.

If this saves someone else a colossal headache then great. I hope it doesn't cause one for anyone!

Best,

Adam Pawlowski
SUNYAB NCS
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