Comment 4 for bug 1554045

This is also affects tempest.api.compute.servers.test_server_rescue_negative.ServerRescueNegativeTestJSON.test_rescued_vm_detach_volume

Even with patch applied, I'm still seeing this (although test_volume_boot_pattern pass):

2016-03-09 08:57:52.629 32268 INFO cinder.volume.flows.manager.create_volume [req-863b5a63-a0a0-4958-8901-2d85bdd44f4c ed2b7665621e40e48f0290628e2ca064 b8a17af901de48399243b8a8cdd38129 - - -] Volume 8c115952-c088-4ac7-91c9-5b8dee5d591d: being created as raw with specification: {'status': u'creating', 'volume_size': 1, 'volume_name': u'volume-8c115952-c088-4ac7-91c9-5b8dee5d591d'}
2016-03-09 08:57:52.943 32268 INFO cinder.volume.flows.manager.create_volume [req-863b5a63-a0a0-4958-8901-2d85bdd44f4c ed2b7665621e40e48f0290628e2ca064 b8a17af901de48399243b8a8cdd38129 - - -] Volume volume-8c115952-c088-4ac7-91c9-5b8dee5d591d (8c115952-c088-4ac7-91c9-5b8dee5d591d): created successfully
2016-03-09 08:57:52.947 32268 INFO cinder.volume.manager [req-863b5a63-a0a0-4958-8901-2d85bdd44f4c ed2b7665621e40e48f0290628e2ca064 b8a17af901de48399243b8a8cdd38129 - - -] Created volume successfully.
2016-03-09 08:57:55.831 32268 INFO cinder.volume.manager [req-a4cdf415-e2d4-41a4-8698-e0cd49750c07 ed2b7665621e40e48f0290628e2ca064 b8a17af901de48399243b8a8cdd38129 - - -] Initialize volume connection completed successfully.
2016-03-09 08:57:56.849 32268 INFO cinder.volume.manager [req-73c7efc6-2fa9-42a3-bf4f-f07fe7cc262b ed2b7665621e40e48f0290628e2ca064 b8a17af901de48399243b8a8cdd38129 - - -] Attach volume completed successfully.
2016-03-09 08:58:11.883 32268 INFO cinder.volume.manager [req-ef697eda-a3c9-44ee-9a88-286a1bebc9fc ed2b7665621e40e48f0290628e2ca064 b8a17af901de48399243b8a8cdd38129 - - -] Terminate volume connection completed successfully.
2016-03-09 08:58:12.473 32268 INFO cinder.volume.manager [req-11d6fc86-f425-4a5b-9c1d-c4429af1e7b0 ed2b7665621e40e48f0290628e2ca064 b8a17af901de48399243b8a8cdd38129 - - -] Detach volume completed successfully.
2016-03-09 08:58:43.437 32268 WARNING cinder.volume.drivers.rbd [req-b9a359cf-53fc-46ec-83f0-20aac64a7e5e ed2b7665621e40e48f0290628e2ca064 b8a17af901de48399243b8a8cdd38129 - - -] ImageBusy error raised while deleting rbd volume. This may have been caused by a connection from a client that has crashed and, if so, may be resolved by retrying the delete after 30 seconds has elapsed.
2016-03-09 08:58:43.447 32268 ERROR cinder.volume.manager [req-b9a359cf-53fc-46ec-83f0-20aac64a7e5e ed2b7665621e40e48f0290628e2ca064 b8a17af901de48399243b8a8cdd38129 - - -] Unable to delete busy volume.