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[Ryan Hsu <rhsu@xxxxxxxxxx>]

Public bug reported:

When using the VC Driver, snapshotting an instance that was boot with an
ISO and has no root disk will cause the following error (full trace
below):

    AttributeError: 'NoneType' object has no attribute 'split'

Scenario is as follows:

    1. Boot an instance using an ISO. Make sure the flavor specifies a 0GB root disk size
    2. Snapshot the instance

Full traceback:

Traceback (most recent call last):
  File "/opt/stack/oslo.messaging/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply
    incoming.message))
  File "/opt/stack/oslo.messaging/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch
    return self._do_dispatch(endpoint, method, ctxt, args)
  File "/opt/stack/oslo.messaging/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch
    result = getattr(endpoint, method)(ctxt, **new_args)
  File "/opt/stack/nova/nova/exception.py", line 88, in wrapped
    payload)
  File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, 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 280, in decorated_function
    pass
  File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/compute/manager.py", line 266, in decorated_function
    return function(self, context, *args, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 309, in decorated_function
    e, sys.exc_info())
  File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/compute/manager.py", line 296, in decorated_function
    return function(self, context, *args, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 359, in decorated_function
    % image_id, instance=instance)
  File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/compute/manager.py", line 349, in decorated_functionot)[0]
  File "/opt/stack/nova/nova/virt/vmwareapi/ds_util.py", line 38, in split_datastore_path
    spl = datastore_path.split('[', 1)[1].split(']', 1)
AttributeError: 'NoneType' object has no attribute 'split'

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: vmware

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https://bugs.launchpad.net/bugs/1297605

Title:
  VMware: Error when snapshotting ISO instance with 0GB root disk

Status in OpenStack Compute (Nova):
  New

Bug description:
  When using the VC Driver, snapshotting an instance that was boot with
  an ISO and has no root disk will cause the following error (full trace
  below):

      AttributeError: 'NoneType' object has no attribute 'split'

  Scenario is as follows:

      1. Boot an instance using an ISO. Make sure the flavor specifies a 0GB root disk size
      2. Snapshot the instance

  Full traceback:

  Traceback (most recent call last):
    File "/opt/stack/oslo.messaging/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply
      incoming.message))
    File "/opt/stack/oslo.messaging/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch
      return self._do_dispatch(endpoint, method, ctxt, args)
    File "/opt/stack/oslo.messaging/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch
      result = getattr(endpoint, method)(ctxt, **new_args)
    File "/opt/stack/nova/nova/exception.py", line 88, in wrapped
      payload)
    File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, 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 280, in decorated_function
      pass
    File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/opt/stack/nova/nova/compute/manager.py", line 266, in decorated_function
      return function(self, context, *args, **kwargs)
    File "/opt/stack/nova/nova/compute/manager.py", line 309, in decorated_function
      e, sys.exc_info())
    File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/opt/stack/nova/nova/compute/manager.py", line 296, in decorated_function
      return function(self, context, *args, **kwargs)
    File "/opt/stack/nova/nova/compute/manager.py", line 359, in decorated_function
      % image_id, instance=instance)
    File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/opt/stack/nova/nova/compute/manager.py", line 349, in decorated_functionot)[0]
    File "/opt/stack/nova/nova/virt/vmwareapi/ds_util.py", line 38, in split_datastore_path
      spl = datastore_path.split('[', 1)[1].split(']', 1)
  AttributeError: 'NoneType' object has no attribute 'split'

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