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

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

** Changed in: nova
    Milestone: None => juno-1

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https://bugs.launchpad.net/bugs/1327476

Title:
  AttributeError: 'unicode' object has no attribute 'tb_frame'

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  Saw this in CI -> http://logs.openstack.org/11/98511/2/check/check-
  grenade-dsvm/5d60567/logs/new/screen-n-cpu.txt.gz?level=ERROR

  2014-06-06 23:00:29.533 ERROR oslo.messaging._drivers.common [req-4ae02289-de3e-4700-968c-7611980e0346 ServerActionsTestXML-67143133 ServerActionsTestXML-1032052660] Returning exception 'unicode' object has no attribute 'tb_frame'
  Traceback (most recent call last):

    File "/opt/stack/new/nova/nova/conductor/manager.py", line 602, in _object_dispatch
      return getattr(target, method)(context, *args, **kwargs)

    File "/opt/stack/new/nova/nova/objects/instance_action.py", line 119, in wrapper
      kwargs['exc_tb'] = ''.join(traceback.format_tb(exc_tb))

    File "/usr/lib/python2.7/traceback.py", line 76, in format_tb
      return format_list(extract_tb(tb, limit))

    File "/usr/lib/python2.7/traceback.py", line 95, in extract_tb
      f = tb.tb_frame

  AttributeError: 'unicode' object has no attribute 'tb_frame'
   to caller
  2014-06-06 23:00:29.534 ERROR oslo.messaging._drivers.common [req-4ae02289-de3e-4700-968c-7611980e0346 ServerActionsTestXML-67143133 ServerActionsTestXML-1032052660] ['Traceback (most recent call last):\n', '  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 134, in _dispatch_and_reply\n    incoming.message))\n', '  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 177, in _dispatch\n    return self._do_dispatch(endpoint, method, ctxt, args)\n', '  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 123, in _do_dispatch\n    result = getattr(endpoint, method)(ctxt, **new_args)\n', '  File "/opt/stack/new/nova/nova/exception.py", line 88, in wrapped\n    payload)\n', '  File "/opt/stack/new/nova/nova/openstack/common/excutils.py", line 82, in __exit__\n    six.reraise(self.type_, self.value, self.tb)\n', '  File "/opt/stack/new/nova/nova/exception.py", line 71, in wrapped\n    return f(self, context, *args, **kw)\n', '  File "/opt/stack/new/nova/nova/compute/manager.py", line 286, in decorated_function\n    pass\n', '  File "/opt/stack/new/nova/nova/openstack/common/excutils.py", line 82, in __exit__\n    six.reraise(self.type_, self.value, self.tb)\n', '  File "/opt/stack/new/nova/nova/compute/manager.py", line 272, in decorated_function\n    return function(self, context, *args, **kwargs)\n', '  File "/opt/stack/new/nova/nova/compute/manager.py", line 336, in decorated_function\n    function(self, context, *args, **kwargs)\n', '  File "/opt/stack/new/nova/nova/compute/utils.py", line 437, in __exit__\n    exc_tb=exc_tb, want_result=False)\n', '  File "/opt/stack/new/nova/nova/objects/instance_action.py", line 121, in wrapper\n    return fn.__get__(None, cls)(*args, **kwargs)\n', '  File "/opt/stack/new/nova/nova/objects/base.py", line 144, in wrapper\n    args, kwargs)\n', '  File "/opt/stack/new/nova/nova/conductor/rpcapi.py", line 355, in object_class_action\n    objver=objver, args=args, kwargs=kwargs)\n', '  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/client.py", line 150, in call\n    wait_for_reply=True, timeout=timeout)\n', '  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/transport.py", line 89, in _send\n    timeout=timeout)\n', '  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 386, in send\n    return self._send(target, ctxt, message, wait_for_reply, timeout)\n', '  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line 379, in _send\n    raise result\n', 'AttributeError: \'unicode\' object has no attribute \'tb_frame\'\nTraceback (most recent call last):\n\n  File "/opt/stack/new/nova/nova/conductor/manager.py", line 602, in _object_dispatch\n    return getattr(target, method)(context, *args, **kwargs)\n\n  File "/opt/stack/new/nova/nova/objects/instance_action.py", line 119, in wrapper\n    kwargs[\'exc_tb\'] = \'\'.join(traceback.format_tb(exc_tb))\n\n  File "/usr/lib/python2.7/traceback.py", line 76, in format_tb\n    return format_list(extract_tb(tb, limit))\n\n  File "/usr/lib/python2.7/traceback.py", line 95, in extract_tb\n    f = tb.tb_frame\n\nAttributeError: \'unicode\' object has no attribute \'tb_frame\'\n\n']
  2014-06-06 23:01:15.378 ERROR nova.virt.libvirt.driver [req-a0da2719-553b-4654-8c45-215b49ce1d3f ServerActionsTestJSON-1623844969 ServerActionsTestJSON-1569101731] An error occurred while trying to launch a defined domain with xml: <domain type='qemu'>

  
  I feel like this is the remote end of the error?  Or maybe it's an oslo bug, idk.

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