Comment 1 for bug 1423772

I was able to reproduce this in Kilo (the original discovery was in Juno), with the same error:

2015-02-20 16:12:52.802 ERROR nova.virt.libvirt.driver [-] [instance: 93ba0373-15cd-4e83-845d-4cfaf7c11416] Live Migration failure: Failed to open file '/dev/disk/by-path/ip-10.10.220.244:3260-iscsi-iqn.2000-05.com.3pardata:22210002ac002a13-lun-1': No such file or directory
2015-02-20 16:12:54.381 ERROR root [-] Original exception being dropped: ['Traceback (most recent call last):\n', ' File "/opt/stack/n ova/nova/virt/libvirt/driver.py", line 5249, in _live_migration\n CONF.libvirt.live_migration_bandwidth)\n', ' File "/usr/local/lib /python2.7/dist-packages/eventlet/tpool.py", line 183, in doit\n result = proxy_call(self._autowrap, f, *args, **kwargs)\n', ' File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 141, in proxy_call\n rv = execute(f, *args, **kwargs)\n', ' File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 122, in execute\n six.reraise(c, e, tb)\n', ' File "/usr/local/lib /python2.7/dist-packages/eventlet/tpool.py", line 80, in tworker\n rv = meth(*args, **kwargs)\n', ' File "/usr/lib/python2.7/dist-p ackages/libvirt.py", line 1582, in migrateToURI2\n if ret == -1: raise libvirtError (\'virDomainMigrateToURI2() failed\', dom=self)\ n', "libvirtError: Failed to open file '/dev/disk/by-path/ip-10.10.220.244:3260-iscsi-iqn.2000-05.com.3pardata:22210002ac002a13-lun-1': No such file or directory\n"]
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/poll.py", line 115, in wait
    listener.cb(fileno)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 214, in main
    result = function(*args, **kwargs)
  File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 5282, in _live_migration
    recover_method(context, instance, dest, block_migration)
  File "/opt/stack/nova/nova/exception.py", line 88, in wrapped
    payload)
  File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 82, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/exception.py", line 71, in wrapped
    return f(self, context, *args, **kw)
  File "/opt/stack/nova/nova/compute/manager.py", line 324, in decorated_function
    kwargs['instance'], e, sys.exc_info())
  File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 82, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/compute/manager.py", line 312, in decorated_function
    return function(self, context, *args, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 5297, in _rollback_live_migration
    context, instance, bdm.volume_id, dest)
  File "/opt/stack/nova/nova/compute/rpcapi.py", line 677, in remove_volume_connection
    instance=instance, volume_id=volume_id)
  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 156, in call
    retry=self.retry)
  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 90, in _send
    timeout=timeout, retry=retry)
  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 417, in send
    retry=retry)
  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 408, in _send
    raise result
TypeError: argument of type 'NoneType' is not iterable
Traceback (most recent call last):

  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply
    executor_callback))

  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 186, in _dispatch
    executor_callback)

  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 130, in _do_dispatch
    result = func(ctxt, **new_args)

  File "/opt/stack/nova/nova/exception.py", line 88, in wrapped
    payload)

  File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 82, in __exit__
    six.reraise(self.type_, self.value, self.tb)

  File "/opt/stack/nova/nova/exception.py", line 71, in wrapped
    return f(self, context, *args, **kw)

  File "/opt/stack/nova/nova/compute/manager.py", line 4847, in remove_volume_connection
    self._detach_volume(context, instance, bdm)

  File "/opt/stack/nova/nova/compute/manager.py", line 4692, in _detach_volume
    self.volume_api.roll_detaching(context, volume_id)

  File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 82, in __exit__
    six.reraise(self.type_, self.value, self.tb)

  File "/opt/stack/nova/nova/compute/manager.py", line 4675, in _detach_volume
    context, self.volume_api, volume_id, connection_info)

  File "/opt/stack/nova/nova/volume/encryptors/__init__.py", line 52, in get_encryption_metadata
    if ('data' in connection_info and

TypeError: argument of type 'NoneType' is not iterable

Removing descriptor: 3