[Nova-volume][tgtd] Failed to detach volume / delete instance when target is already disconnected

[root@camel-nova nova]# nova volume-attach toattach 17 /dev/vdd

[root@camel-vdsa ~]# iscsiadm -m session
tcp: [21] 10.35.97.20:3260,1 iqn.2010-10.org.openstack:volume-00000011
[root@camel-vdsa ~]# iscsiadm -m session -u
Logging out of session [sid: 21, target: iqn.2010-10.org.openstack:volume-00000011, portal: 10.35.97.20,3260]
Logout of [sid: 21, target: iqn.2010-10.org.openstack:volume-00000011, portal: 10.35.97.20,3260] successful.

[root@camel-nova nova]# nova volume-detach toattach 17

Compute.log:
2012-06-10 16:52:09 ERROR nova.rpc.amqp [req-691b5982-1882-4c5e-b8fc-3b3da26a0699 2f4edfa99cab42de92eacda360043116 7eed65dd55474b9e94cd412d9f66b406] Exception during message handling
2012-06-10 16:52:09 TRACE nova.rpc.amqp Traceback (most recent call last):
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/rpc/amqp.py", line 252, in _process_data
2012-06-10 16:52:09 TRACE nova.rpc.amqp rval = node_func(context=ctxt, **node_args)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/exception.py", line 114, in wrapped
2012-06-10 16:52:09 TRACE nova.rpc.amqp return f(*args, **kw)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 153, in decorated_function
2012-06-10 16:52:09 TRACE nova.rpc.amqp function(self, context, instance_uuid, *args, **kwargs)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 177, in decorated_function
2012-06-10 16:52:09 TRACE nova.rpc.amqp sys.exc_info())
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__
2012-06-10 16:52:09 TRACE nova.rpc.amqp self.gen.next()
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 171, in decorated_function
2012-06-10 16:52:09 TRACE nova.rpc.amqp return function(self, context, instance_uuid, *args, **kwargs)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 1770, in detach_volume
2012-06-10 16:52:09 TRACE nova.rpc.amqp self._detach_volume(context, instance_ref, bdm)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 1760, in _detach_volume
2012-06-10 16:52:09 TRACE nova.rpc.amqp mp)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/exception.py", line 114, in wrapped
2012-06-10 16:52:09 TRACE nova.rpc.amqp return f(*args, **kw)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/connection.py", line 582, in detach_volume
2012-06-10 16:52:09 TRACE nova.rpc.amqp mount_device)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/connection.py", line 524, in volume_driver_method
2012-06-10 16:52:09 TRACE nova.rpc.amqp return method(connection_info, *args, **kwargs)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/utils.py", line 946, in inner
2012-06-10 16:52:09 TRACE nova.rpc.amqp retval = f(*args, **kwargs)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/volume.py", line 206, in disconnect_volume
2012-06-10 16:52:09 TRACE nova.rpc.amqp check_exit_code=[0, 255])
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/volume.py", line 110, in _run_iscsiadm
2012-06-10 16:52:09 TRACE nova.rpc.amqp check_exit_code=check_exit_code)
2012-06-10 16:52:09 TRACE nova.rpc.amqp File "/usr/lib/python2.6/site-packages/nova/utils.py", line 243, in execute
2012-06-10 16:52:09 TRACE nova.rpc.amqp cmd=' '.join(cmd))
2012-06-10 16:52:09 TRACE nova.rpc.amqp ProcessExecutionError: Unexpected error while running command.
2012-06-10 16:52:09 TRACE nova.rpc.amqp Command: sudo nova-rootwrap iscsiadm -m node -T iqn.2010-10.org.openstack:volume-00000011 -p 10.35.97.20:3260 --logout
2012-06-10 16:52:09 TRACE nova.rpc.amqp Exit code: 21
2012-06-10 16:52:09 TRACE nova.rpc.amqp Stdout: ''
2012-06-10 16:52:09 TRACE nova.rpc.amqp Stderr: 'iscsiadm: No matching sessions found\n'
2012-06-10 16:52:09 TRACE nova.rpc.amqp

[root@camel-nova nova]# nova volume-list
+----+-----------+-------------------+------+-------------+--------------------------------------+
| ID | Status | Display Name | Size | Volume Type | Attached to |
| 17 | in-use | a | 1 | None | 704340ab-4c9a-42e1-b676-fb33ae624adf |

[root@camel-nova nova]# nova delete toattach
[same error in compute log]
2012-06-10 16:54:52 TRACE nova.rpc.amqp Command: sudo nova-rootwrap iscsiadm -m node -T iqn.2010-10.org.openstack:volume-00000011 -p 10.35.97.20:3260 --logout
2012-06-10 16:54:52 TRACE nova.rpc.amqp Exit code: 21
2012-06-10 16:54:52 TRACE nova.rpc.amqp Stdout: ''
2012-06-10 16:54:52 TRACE nova.rpc.amqp Stderr: 'iscsiadm: No matching sessions found\n'

[root@camel-nova nova]# nova list
+--------------------------------------+----------+---------+----------------------+
| ID | Name | Status | Networks |
+--------------------------------------+----------+---------+----------------------+
| 704340ab-4c9a-42e1-b676-fb33ae624adf | toattach | ACTIVE | davidnet=192.168.1.4 |
+--------------------------------------+----------+---------+----------------------+