Output of ImageUnacceptable exception is wrong

Create a boot-volume when the qemu-img of cinder-volume is not installed.
The output of ImageUnacceptable is: Image f0085e76-3bd9-410c-9a99-170a550f9acb is unacceptable: qemu-img is not installed and image is of type False. Only RAW images can be used if qemu-img is not installed.
Obviously, the description should be [......and image is of type qcow2...], qcow2 is the disk format of the image.

Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server [None req-545fcda8-e888-4f58-823a-4d1cafa387b8 None None] Exception during message handling: ImageUnacceptable: Image f0085e76-3bd9-410c-9a99-170a550f9acb is unacceptable: qemu-img is not installed and image is of type False. Only RAW images can be used if qemu-img is not installed.
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server Traceback (most recent call last):
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 166, in _process_incoming
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server res = self.dispatcher.dispatch(message)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 265, in dispatch
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server return self._do_dispatch(endpoint, method, ctxt, args)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server result = func(ctxt, **new_args)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "<decorator-gen-673>", line 2, in create_volume
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/objects/cleanable.py", line 208, in wrapper
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server result = f(*args, **kwargs)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/volume/manager.py", line 749, in create_volume
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server _run_flow()
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/volume/manager.py", line 741, in _run_flow
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server flow_engine.run()
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/taskflow/engines/action_engine/engine.py", line 247, in run
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server for _state in self.run_iter(timeout=timeout):
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/taskflow/engines/action_engine/engine.py", line 340, in run_iter
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server failure.Failure.reraise_if_any(er_failures)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/taskflow/types/failure.py", line 339, in reraise_if_any
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server failures[0].reraise()
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/taskflow/types/failure.py", line 346, in reraise
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server six.reraise(*self._exc_info)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/usr/lib/python2.7/site-packages/taskflow/engines/action_engine/executor.py", line 53, in _execute_task
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server result = task.execute(**arguments)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/volume/flows/manager/create_volume.py", line 970, in execute
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server **volume_spec)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/volume/flows/manager/create_volume.py", line 860, in _create_from_image
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server image_service)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "<decorator-gen-672>", line 2, in _prepare_image_cache_entry
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/coordination.py", line 151, in _synchronized
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server return f(*a, **k)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/volume/flows/manager/create_volume.py", line 660, in _prepare_image_cache_entry
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server update_cache=True)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/volume/flows/manager/create_volume.py", line 733, in _create_from_image_cache_or_download
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server backend_name) as tmp_image:
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/usr/lib64/python2.7/contextlib.py", line 17, in __enter__
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server return self.gen.next()
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/image/image_utils.py", line 849, in fetch
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server fetch_verify_image(context, image_service, image_id, tmp)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/image/image_utils.py", line 478, in fetch_verify_image
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server dest, run_as_root)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server File "/opt/stack/cinder/cinder/image/image_utils.py", line 454, in get_qemu_data
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server image_id=image_id)
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server ImageUnacceptable: Image f0085e76-3bd9-410c-9a99-170a550f9acb is unacceptable: qemu-img is not installed and image is of type False. Only RAW images can be used if qemu-img is not installed.
Jan 13 20:30:10 localhost.localdomain cinder-volume[83314]: ERROR oslo_messaging.rpc.server