Description of problem:

I have an iscsi dc with one active storage domain and two active hosts
I am trying to live 
migrate the vm from one host to another and I am receiving a message
cParams:{'path': ''} truesize:0 type:disk volExtensionChunk:1024 watermarkLimit:536870912
Traceback (most recent call last):
  File "/usr/share/vdsm/clientIF.py", line 355, in teardownVolumePath
    res = self.irs.teardownImage(drive['domainID'],
  File "/usr/share/vdsm/vm.py", line 1343, in __getitem__
    raise KeyError(key)
KeyError: 'domainID'
Thread-2166::ERROR::2013-08-21 14:40:51,241::vm::2062::vm.Vm::(_startUnderlyingVm) vmId=`6b2a7374-3c3f-4c0e-8c06-ea583e303fda`::The vm start process failed
Traceback (most recent call last):
  File "/usr/share/vdsm/vm.py", line 2040, in _startUnderlyingVm
    self._waitForIncomingMigrationFinish()
  File "/usr/share/vdsm/vm.py", line 3364, in _waitForIncomingMigrationFinish
    self._connection.lookupByUUIDString(self.id),
  File "/usr/lib64/python2.6/site-packages/vdsm/libvirtconnection.py", line 76, in wrapper
    ret = f(*args, **kwargs)
  File "/usr/lib64/python2.6/site-packages/libvirt.py", line 2838, in lookupByUUIDString
    if ret is None:raise libvirtError('virDomainLookupByUUIDString() failed', conn=self)
libvirtError: Domain not found: no domain with matching uuid '6b2a7374-3c3f-4c0e-8c06-ea583e303fda'
Thread-2166::DEBUG::2013-08-21 14:40:51,245::vm::2452::vm.Vm::(setDownStatus) vmId=`6b2a7374-3c3f-4c0e-8c06-ea583e303fda`::Changed state to Down: Domain not found: no domain with matching uuid '6b2a7374-3c3f-4c0
e-8c06-ea583e303fda'


one of the host was previously connected to an nfs dc with an nfs storage
so maybe something is not cleaned up properly.