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[Arnaud Legendre <arnaudleg@xxxxxxxxx>]

Public bug reported:

There are a couple of places in the driver where we use the keys()
function without checking for None.

I have seen several times the following exception:
2014-09-22 11:45:07.312 ERROR nova.openstack.common.periodic_task [-] Error during ComputeManager.update_available_resource: 'NoneType' object has no attribute 'keys'
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task Traceback (most recent call last):
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task   File "/opt/stack/nova/nova/openstack/common/periodic_task.py", line 198, in run_periodic_tasks
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task     task(self, context)
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task   File "/opt/stack/nova/nova/compute/manager.py", line 5909, in update_available_resource
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task     nodenames = set(self.driver.get_available_nodes())
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task   File "/opt/stack/nova/nova/virt/vmwareapi/driver.py", line 426, in get_available_nodes
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task     self._update_resources()
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task   File "/opt/stack/nova/nova/virt/vmwareapi/driver.py", line 306, in _update_resources
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task     added_nodes = set(self.dict_mors.keys()) - set(self._resource_keys)
2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task AttributeError: 'NoneType' object has no attribute 'keys'

** Affects: nova
     Importance: Low
     Assignee: Arnaud Legendre (arnaudleg)
         Status: Confirmed

** Changed in: nova
     Assignee: (unassigned) => Arnaud Legendre (arnaudleg)

** Changed in: nova
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1372672

Title:
  VMware: 'NoneType' object has no attribute 'keys' in the driver

Status in OpenStack Compute (Nova):
  Confirmed

Bug description:
  There are a couple of places in the driver where we use the keys()
  function without checking for None.

  I have seen several times the following exception:
  2014-09-22 11:45:07.312 ERROR nova.openstack.common.periodic_task [-] Error during ComputeManager.update_available_resource: 'NoneType' object has no attribute 'keys'
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task Traceback (most recent call last):
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task   File "/opt/stack/nova/nova/openstack/common/periodic_task.py", line 198, in run_periodic_tasks
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task     task(self, context)
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task   File "/opt/stack/nova/nova/compute/manager.py", line 5909, in update_available_resource
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task     nodenames = set(self.driver.get_available_nodes())
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task   File "/opt/stack/nova/nova/virt/vmwareapi/driver.py", line 426, in get_available_nodes
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task     self._update_resources()
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task   File "/opt/stack/nova/nova/virt/vmwareapi/driver.py", line 306, in _update_resources
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task     added_nodes = set(self.dict_mors.keys()) - set(self._resource_keys)
  2014-09-22 11:45:07.312 TRACE nova.openstack.common.periodic_task AttributeError: 'NoneType' object has no attribute 'keys'

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