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[Bug 1206948] Re: TypeError: 'NoneType' object has no attribute '__getitem__'

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

** Changed in: nova
    Milestone: None => havana-3

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https://bugs.launchpad.net/bugs/1206948

Title:
  TypeError: 'NoneType' object has no attribute '__getitem__'

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  After running install_os_domU.sh (described on https://github.com
  /openstack-dev/devstack/blob/master/tools/xen/README.md) I receive the
  following error(s) when starting nova-compute. Since I am absolutely
  new to python I cannot fix it by myself. The only thing I can report
  is: when I edit /opt/stack/nova/nova/utils.py and replace the last
  line (1164) with "return 1" nova-compute works and connects to my
  controller node. But then I can't successfully create virtual machines
  on this xenserver node.

  2013-07-31 14:51:38.658 DEBUG nova.virt.xenapi.host [-] Updating host stats from (pid=1061) update_status /opt/stack/nova/nova/virt/xenapi/host.py:149
  Traceback (most recent call last):
    File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/poll.py", line 97, in wait
      readers.get(fileno, noop).cb(fileno)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 194, in main
      result = function(*args, **kwargs)
    File "/opt/stack/nova/nova/openstack/common/service.py", line 65, in run_service
      service.start()
    File "/opt/stack/nova/nova/service.py", line 174, in start
      self.manager.pre_start_hook(rpc_connection=self.conn)
    File "/opt/stack/nova/nova/compute/manager.py", line 786, in pre_start_hook
      self.update_available_resource(nova.context.get_admin_context())
    File "/opt/stack/nova/nova/compute/manager.py", line 4608, in update_available_resource
      rt.update_available_resource(context)
    File "/opt/stack/nova/nova/openstack/common/lockutils.py", line 246, in inner
      return f(*args, **kwargs)
    File "/opt/stack/nova/nova/compute/resource_tracker.py", line 259, in update_available_resource
      resources = self.driver.get_available_resource(self.nodename)
    File "/opt/stack/nova/nova/virt/xenapi/driver.py", line 402, in get_available_resource
      hyper_ver = utils.convert_version_to_int(self._session.product_version)
    File "/opt/stack/nova/nova/utils.py", line 1164, in convert_version_to_int
      return version[0] * 1000000 + version[1] * 1000 + version[2]
  TypeError: 'NoneType' object has no attribute '__getitem__'
  Removing descriptor: 5
  2013-07-31 14:51:38.995 ERROR nova.openstack.common.threadgroup [-] 'NoneType' object has no attribute '__getitem__'
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup Traceback (most recent call last):
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/openstack/common/threadgroup.py", line 117, in wait
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     x.wait()
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/openstack/common/threadgroup.py", line 49, in wait
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     return self.thread.wait()
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 168, in wait
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     return self._exit_event.wait()
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/event.py", line 116, in wait
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     return hubs.get_hub().switch()
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 187, in switch
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     return self.greenlet.switch()
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 194, in main
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     result = function(*args, **kwargs)
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/openstack/common/service.py", line 65, in run_service
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     service.start()
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/service.py", line 174, in start
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     self.manager.pre_start_hook(rpc_connection=self.conn)
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/compute/manager.py", line 786, in pre_start_hook
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     self.update_available_resource(nova.context.get_admin_context())
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/compute/manager.py", line 4608, in update_available_resource
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     rt.update_available_resource(context)
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/openstack/common/lockutils.py", line 246, in inner
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     return f(*args, **kwargs)
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/compute/resource_tracker.py", line 259, in update_available_resource
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     resources = self.driver.get_available_resource(self.nodename)
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/virt/xenapi/driver.py", line 402, in get_available_resource
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     hyper_ver = utils.convert_version_to_int(self._session.product_version)
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup   File "/opt/stack/nova/nova/utils.py", line 1164, in convert_version_to_int
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup     return version[0] * 1000000 + version[1] * 1000 + version[2]
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup TypeError: 'NoneType' object has no attribute '__getitem__'
  2013-07-31 14:51:38.995 TRACE nova.openstack.common.threadgroup 
  2013-07-31 14:51:38.997 DEBUG amqp [-] Closed channel #1 from (pid=1061) _do_close /usr/local/lib/python2.7/dist-packages/amqp/channel.py:88
  2013-07-31 14:51:39.032 DEBUG amqp [-] Closed channel #1 from (pid=1061) _do_close /usr/local/lib/python2.7/dist-packages/amqp/channel.py:88

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