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[wangpan <hzwangpan@xxxxxxxxxxxxxxxx>]

I think this bug was fixed in Folsom, so change it to fix released.

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

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https://bugs.launchpad.net/bugs/1026029

Title:
  reboot instance catches exception: libvirtError: Domain not found

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  I was running into a exception when trying to reboot(automatically)
  all vm instances after the compute node failover(nova version is
  Diablo);

  this code piece maybe related:
  nova/virt/libvirt/connection.py:501
      virt_dom = self._conn.lookupByName(instance['name'])

  on the newly up host, there is no virt Domain, the above lookupByName would definitely failed and throw an exception;
  to put this calling in a `try except' may be better.

  detailed trace:

  2012-07-18 15:55:09,422 CRITICAL nova [-] Domain not found: no domain with matching name 'instance-0000007a'
  (nova): TRACE: Traceback (most recent call last):
  (nova): TRACE:   File "/usr/bin/nova-compute", line 49, in <module>
  (nova): TRACE:     service.wait()
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/service.py", line 357, in wait
  (nova): TRACE:     _launcher.wait()
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/service.py", line 107, in wait
  (nova): TRACE:     service.wait()
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py", line 166, in wait
  (nova): TRACE:     return self._exit_event.wait()
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/eventlet/event.py", line 116, in wait
  (nova): TRACE:     return hubs.get_hub().switch()
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 177, in switch
  (nova): TRACE:     return self.greenlet.switch()
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py", line 192, in main
  (nova): TRACE:     result = function(*args, **kwargs)
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/service.py", line 77, in run_server
  (nova): TRACE:     server.start()
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/service.py", line 137, in start
  (nova): TRACE:     self.manager.init_host()
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 176, in init_host
  (nova): TRACE:     self.reboot_instance(context, instance['id'])
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 100, in wrapped
  (nova): TRACE:     return f(*args, **kw)
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 118, in decorated_function
  (nova): TRACE:     function(self, context, instance_id, *args, **kwargs)
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 636, in reboot_instance
  (nova): TRACE:     self.driver.reboot(instance_ref, network_info)
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 100, in wrapped
  (nova): TRACE:     return f(*args, **kw)
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 501, in reboot
  (nova): TRACE:     virt_dom = self._conn.lookupByName(instance['name'])
  (nova): TRACE:   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 1870, in lookupByName
  (nova): TRACE:     if ret is None:raise libvirtError('virDomainLookupByName() failed', conn=self)
  (nova): TRACE: libvirtError: Domain not found: no domain with matching name 'instance-0000007a'

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