The stable/ocata changes have been dropped because the commit that introduced this bug was added in Pike:
https://github.com/openstack/nova/commit/63805735c25a54ad1b9b97e05080c1a6153d8e22
Before this, the compute would reserve the volume which means that it will be cleaned up on a normal delete. If scheduling fails, the volume won't be reserved anyways.
The stable/ocata changes have been dropped because the commit that introduced this bug was added in Pike:
https:/ /github. com/openstack/ nova/commit/ 63805735c25a54a d1b9b97e05080c1 a6153d8e22
Before this, the compute would reserve the volume which means that it will be cleaned up on a normal delete. If scheduling fails, the volume won't be reserved anyways.