Comment 1 for bug 1745149

Looks like a Nova problem. We need the logs from this, but my assumption is the Cinder volume is indeed attached and therefore in-use, so Cinder is working as expected.

I am not sure if the expectation on the Nova side is that they fully rollback and clean up the Cinder volume in case of a failure like this, or if it is kept around as a means to troubleshoot what happened.