Comment 10 for bug 1348204

There were 3 changes merged to nova's libvirt driver on 7/18 related to volumes which might be interesting:

https://github.com/openstack/nova/commit/54458334136b284bb0c45373e7cacf5c1fa0ab99
https://github.com/openstack/nova/commit/d19c75c19d2de8b20e82e6de9413ba53671ad7fb
https://github.com/openstack/nova/commit/4fc6f87af0399e9f2b8042629eecbd1f804ff7d7

The first is a logging change, so that shouldn't be an issue.

4fc6f87af0399e9f2b8042629eecbd1f804ff7d7 doesn't seem related since that should only be hit when updating host stats.

Given d19c75c19d2de8b20e82e6de9413ba53671ad7fb is messing with the attach/detach volume flows with respect to the bdm connection info, and that's what we're seeing hit encrypt/decrypt failures, that'd be the one I'd probably focus on as introducing the bug.