vmware start instance from snapshot error

[linbing]

1. I take a snapshot from vmware instance, then the snapshot image(which is link_clone of snapshot) will be saved in glance server.
2. Start from this snapshot image from glance server. then got the following error

2015-12-15 01:32:05.255 25992 DEBUG oslo_vmware.api [-] Invoking VIM API to read info of task: (returnval){
   value = "task-1896"
   _type = "Task"
 }. _poll_task /usr/lib/python2.7/site-packages/oslo_vmware/api.py:397
2015-12-15 01:32:05.255 25992 DEBUG oslo_vmware.api [-] Waiting for function _invoke_api to return. func /usr/lib/python2.7/site-packages/oslo_vmware/api.py:121

2015-12-15 01:32:05.285 25992 DEBUG oslo_vmware.exceptions [-] Fault InvalidArgument not matched. get_fault_class /usr/lib/python2.7/site-packages/oslo_vmware/exceptions.py:296
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall [-] in fixed duration looping call
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall Traceback (most recent call last):
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall File "/usr/lib/python2.7/site-packages/oslo_vmware/common/loopingcall.py", line 76, in _inner
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall self.f(*self.args, **self.kw)
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall File "/usr/lib/python2.7/site-packages/oslo_vmware/api.py", line 428, in _poll_task
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall raise task_ex
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall VimFaultException: 指定的参数错误。
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall capacity
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall Faults: ['InvalidArgument']
2015-12-15 01:32:05.285 25992 ERROR oslo_vmware.common.loopingcall
2015-12-15 01:32:05.286 25992 ERROR nova.virt.vmwareapi.vmops [req-c466c53c-0a9c-45d7-aa78-c8812b4021a2 4b7fde8604c24e919e46b68fdf50b5a5 b0eab665ecd94e86885e03027ab90528 - - -] [instance: bea53465-ac4f-40f4-9937-f99024a8075d] Extending virtual disk failed with error: 指定的参数错误。
capacity

3. I track the error,
nova/virt/vmwareapi/vmops.py
 def spawn()
    self._use_disk_image_as_linked_clone(vm_ref, vi)
      self._extend_if_required
        self._extend_virtual_disk()
            def _extend_virtual_disk()
                vmdk_extend_task = self._session._call_method(
                self._session.vim,
                "ExtendVirtualDisk_Task",
                service_content.virtualDiskManager,
                name=name,
                datacenter=dc_ref,
                newCapacityKb=requested_size,
                eagerZero=False)
my vimserver is :
/opt/stack/vmware/wsdl/5.0/vimService.wsdl
vcenter version is :5.1.0
openstack version is : Liberty

4. When I shield _extend_if_required in _use_disk_image_as_linked_clone, then will be successful.

[Andriy Kurilin (andreykurilin)]

Merged-Fix: https://review.openstack.org/#/c/168024/