# Pastebin 9pmFpEkD
Some detail about this bug: 

Nova can't detach volume in init host routine

Scenario:
1. create a vm using bootable volume.
2. delete this vm
3. restart service nova-compute when vm's task state is deleting.
When nova-compute is up, vm became deleted successful, but the bootable
volume is still in-use state and can't delete it using cinder delete volume.
solve method:
Add init=True in _delete_instance when init_host, and raise exception
when EndpointNotFound exists. It will set vm's status to error and
make user can re-issue a delete.