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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1425115

Title:
  nova can't start with libvirt-xen driver

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  Hi,

  A recent change introduced by https://review.openstack.org/152177
  break nova on Xen (with the libvirt driver).

  This is the error:
  libvirtError: this function is not supported by the connection driver: virNodeGetCPUMap

  And the traceback:
    File "/opt/stack/nova/nova/openstack/common/service.py", line 491, in run_service
      service.start()
    File "/opt/stack/nova/nova/service.py", line 181, in start
      self.manager.pre_start_hook()
    File "/opt/stack/nova/nova/compute/manager.py", line 1188, in pre_start_hook
      self.update_available_resource(nova.context.get_admin_context())
    File "/opt/stack/nova/nova/compute/manager.py", line 6062, in update_available_resource
      rt.update_available_resource(context)
    File "/opt/stack/nova/nova/compute/resource_tracker.py", line 315, in update_available_resource
      resources = self.driver.get_available_resource(self.nodename)
    File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 4896, in get_available_resource
      numa_topology = self._get_host_numa_topology()
    File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 4749, in _get_host_numa_topology
      online_cpus = self._host.get_online_cpus()
    File "/opt/stack/nova/nova/virt/libvirt/host.py", line 599, in get_online_cpus
      (cpus, cpu_map, online) = self.get_connection().getCPUMap()
    File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 183, in doit
      result = proxy_call(self._autowrap, f, *args, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 141, in proxy_call
      rv = execute(f, *args, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 122, in execute
      six.reraise(c, e, tb)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 80, in tworker
      rv = meth(*args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3604, in getCPUMap
      if ret is None: raise libvirtError ('virNodeGetCPUMap() failed', conn=self)

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