Comment 5 for bug 1964576

So we saw this log message:

Ignoring exception while attempting to rollback volume connections for volume a6bd064e-bc3b-4eab-81b6-f1c2b81ac9f8 on host cmp123.

Then we checked the bdm in the nova db and the volume attachment in the cinder db.
Then we saw a missmatch between nova and cinder and also realised that there are multiple active attachments on the cinder side, even though the multiattach flag is turned off. After some investigation we didnt find a cause for this issue.

I get your confusion and I/we are also very confused, but we wanted to provide a safe way that if this rare/weird case happens, that it is handled correctly. Also the fix i proposed should not have an impact if everything is working fine.