Why does deleting a VM in RHEV fail with the error "Failed to DeleteImageGroupVDS, error = not enough arguments for format string" ?

Issue

• Trying to delete a vm in RHEV fails with either of the below error in rhevm.log.

2012-12-07 16:40:39,633 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase] (pool-11-thread-49) Error code GeneralException and error message IRSGenericException: IRSErrorException: Failed to DeleteImageGroupVDS, error = not enough arguments for format string

OR

ERROR [org.ovirt.engine.core.bll.RemoveImageCommand] (http-0.0.0.0-8443-3) Command org.ovirt.engine.core.bll.RemoveImageCommand throw Vdc Bll exception. With error message VdcBLLException: org.ovirt.engine.core.vdsbroker.irsbroker.IrsOperationFailedNoFailoverException: IRSGenericException: IRSErrorException: Image does not exist in domain: 'image=f0d1c9c9-3cf4-49a5-ab8b-7e387a4bb23e, domain=5b501f3c-2853-4c2c-8d4e-0b3753adebce'

• vdsm.log has below messages.

Thread-204275::WARNING::2012-12-07 21:23:56,571::blockSD::925::Storage.StorageDomain::(rmDCVolLinks) Can't unlink /rhev/data-center/mnt/blockSD/0869a721-55c4-4639-aa60-05da4eea3aac/images/95c918df-d063-48dc-86af-3466b2197287/da7c6289-3e9e-46fb-931a-c1dcd056332b. [Errno 2] No such file or directory: '/rhev/data-center/mnt/blockSD/0869a721-55c4-4639-aa60-05da4eea3aac/images/95c918df-d063-48dc-86af-3466b2197287/da7c6289-3e9e-46fb-931a-c1dcd056332b'

Thread-204275::DEBUG::2012-12-07 21:23:56,572::blockSD::928::Storage.StorageDomain::(rmDCVolLinks) removed: []
Thread-204275::ERROR::2012-12-07 21:23:56,572::task::853::TaskManager.Task::(_setError) Task=`2b0b7280-0ac4-410c-ab79-d38767f1eee1`::Unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/task.py", line 861, in _run
  File "/usr/share/vdsm/logUtils.py", line 38, in wrapper
  File "/usr/share/vdsm/storage/hsm.py", line 1349, in deleteImage
  File "/usr/share/vdsm/storage/blockSD.py", line 946, in deleteImage
  File "/usr/share/vdsm/storage/blockSD.py", line 937, in rmDCImgDir
  File "/usr/lib64/python2.6/logging/__init__.py", line 1068, in warning
  File "/usr/lib64/python2.6/logging/__init__.py", line 1173, in _log
  File "/usr/lib64/python2.6/logging/__init__.py", line 1183, in handle
  File "/usr/lib64/python2.6/logging/__init__.py", line 1220, in callHandlers
  File "/usr/lib64/python2.6/logging/__init__.py", line 679, in handle
  File "/usr/lib64/python2.6/logging/handlers.py", line 776, in emit
  File "/usr/lib64/python2.6/logging/__init__.py", line 654, in format
  File "/usr/lib64/python2.6/logging/__init__.py", line 436, in format
  File "/usr/lib64/python2.6/logging/__init__.py", line 306, in getMessage
TypeError: not enough arguments for format string

Thread-890260::ERROR::2012-12-17 21:32:47,264::task::853::TaskManager.Task::(_setError) Task=`37027b5f-774c-4565-985e-f77ef4876614`::Unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/task.py", line 861, in _run
  File "/usr/share/vdsm/logUtils.py", line 38, in wrapper
  File "/usr/share/vdsm/storage/hsm.py", line 1324, in deleteImage
ImageDoesNotExistInSD: Image does not exist in domain: 'image=95c918df-d063-48dc-86af-3466b2197287, domain=0869a721-55c4-4639-aa60-05da4eea3aac' <=======