[Bug 1418187] Re: _get_host_numa_topology assumes numa cell has memory

[Augustina Ragwitz]

This bug was marked Incomplete but it is unclear what further
information is needed before it can be Confirmed. What further
information is needed for this to be triaged in Nova?

-- 
You received this bug notification because you are a member of Ubuntu
OpenStack, which is subscribed to nova in Ubuntu.
https://bugs.launchpad.net/bugs/1418187

Title:
  _get_host_numa_topology assumes numa cell has memory

Status in OpenStack Compute (nova):
  Incomplete
Status in OpenStack Compute (nova) juno series:
  Fix Released
Status in nova package in Ubuntu:
  Incomplete

Bug description:
  numa cells are not guaranteed to have memory.
  libvirt capabilities represent that correctly.
  nova's _get_host_numa_topology assumes that it can convert cell's memory to
  kilobytes via: 
     memory=cell.memory / units.Ki.

  but cell.memory ends up being None. for some
  LibvirtConfigCapsNUMACell.

  stack trace is like this:
  [-] unsupported operand type(s) for /: 'NoneType' and 'int'
  Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/nova/openstack/common/threadgroup.py", line 145, in wait
      x.wait()
    File "/usr/lib/python2.7/dist-packages/nova/openstack/common/threadgroup.py", line 47, in wait
      return self.thread.wait()
    File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py", line 173, in wait
      return self._exit_event.wait()
    File "/usr/lib/python2.7/dist-packages/eventlet/event.py", line 121, in wait
      return hubs.get_hub().switch()
    File "/usr/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 293, in switch
      return self.greenlet.switch()
    File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py", line 212, in main
      result = function(*args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/nova/openstack/common/service.py", line 492, in run_service
      service.start()
    File "/usr/lib/python2.7/dist-packages/nova/service.py", line 181, in start
      self.manager.pre_start_hook()
    File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1188, in pre_start_hook
      self.update_available_resource(nova.context.get_admin_context())
    File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 6047, in update_available_resource
      rt.update_available_resource(context)
    File "/usr/lib/python2.7/dist-packages/nova/compute/resource_tracker.py", line 313, in update_available_resource
      resources = self.driver.get_available_resource(self.nodename)
    File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 4825, in get_available_resource
      numa_topology = self._get_host_numa_topology()
    File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 4703, in _get_host_numa_topology
      for cell in topology.cells])
  TypeError: unsupported operand type(s) for /: 'NoneType' and 'int'

To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1418187/+subscriptions