Comment 0 for bug 1645298

Removing a unit of an application with attached storage volumes results in the unit never getting passed 'stopping' state - the volume detachment appears to be blocked:

Machine Unit Storage Id Provider Id Device Size State Message
[...]
8 6 b5fd3fd0-e1e4-4336-9184-802ebf88b827 vde 20GiB detaching detaching volume b5fd3fd0-e1e4-4336-9184-802ebf88b827 from server e91554fe-73a8-4262-a18d-20cab54ca57d: failed to delete volume attachment
caused by: request (http://10.245.161.158:8774/v2.1/1ab499d2bf994c87a151c339624e9d26/servers/e91554fe-73a8-4262-a18d-20cab54ca57d/os-volume_attachments/b5fd3fd0-e1e4-4336-9184-802ebf88b827) returned unexpected status: 415; error info: {"badMediaType": {"message": "Unsupported Content-Type", "code": 415}}
8 7 29fb717c-114d-4fef-9177-6c62c8c14b20 vdd 20GiB detaching detaching volume 29fb717c-114d-4fef-9177-6c62c8c14b20 from server e91554fe-73a8-4262-a18d-20cab54ca57d: failed to delete volume attachment
caused by: request (http://10.245.161.158:8774/v2.1/1ab499d2bf994c87a151c339624e9d26/servers/e91554fe-73a8-4262-a18d-20cab54ca57d/os-volume_attachments/29fb717c-114d-4fef-9177-6c62c8c14b20) returned unexpected status: 415; error info: {"badMediaType": {"message": "Unsupported Content-Type", "code": 415}}
8 8 0dda12b4-0f13-4b0f-80c1-382e663a4389 vdc 20GiB detaching detaching volume 0dda12b4-0f13-4b0f-80c1-382e663a4389 from server e91554fe-73a8-4262-a18d-20cab54ca57d: failed to delete volume attachment
caused by: request (http://10.245.161.158:8774/v2.1/1ab499d2bf994c87a151c339624e9d26/servers/e91554fe-73a8-4262-a18d-20cab54ca57d/os-volume_attachments/0dda12b4-0f13-4b0f-80c1-382e663a4389) returned unexpected status: 415; error info: {"badMediaType": {"message": "Unsupported Content-Type", "code": 415}}

I think this is related to the problems with goose identified in bug 1625624.