Failed to launch VM with Nova version of "2015.1.0b2-656-g5208925"

[Trung Trinh]

Affected software version:
 - Nova: 2015.1.0b2-656-g5208925
 - Horizon: 2015.1.0b2-359-g36e87c6

Description:
With the above software version (installed by using DevStack), use Horizon to launch new VM (configuration of VM is no matter).
The launching process is stuck forever at the task state of "SCHEDULING" with the following Traceback of Nova-conductor:

Logged from file dispatcher.py, line 151
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 457, in fire_timers
    timer()
  File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/timer.py", line 58, in __call__
    cb(*args, **kw)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 217, in main
    self._resolve_links()
  File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 232, in _resolve_links
    f(self, *ca, **ckw)
  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_executors/impl_eventlet.py", line 44, in complete
    thread.wait()
  File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 175, in wait
    return self._exit_event.wait()
  File "/usr/local/lib/python2.7/dist-packages/eventlet/event.py", line 125, in wait
    current.throw(*self._exc)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 214, in main
    result = function(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 136, in <lambda>
    yield lambda: self._dispatch_and_reply(incoming, executor_callback)
  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 151, in _dispatch_and_reply
    exc_info=exc_info)
  File "/usr/lib/python2.7/logging/__init__.py", line 1178, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/usr/lib/python2.7/logging/__init__.py", line 1271, in _log
    self.handle(record)
  File "/usr/lib/python2.7/logging/__init__.py", line 1281, in handle
    self.callHandlers(record)
  File "/usr/lib/python2.7/logging/__init__.py", line 1321, in callHandlers
    hdlr.handle(record)
  File "/usr/lib/python2.7/logging/__init__.py", line 749, in handle
    self.emit(record)
  File "/usr/lib/python2.7/logging/handlers.py", line 842, in emit
    msg = self.format(record) + '\000'
  File "/usr/lib/python2.7/logging/__init__.py", line 724, in format
    return fmt.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/formatters.py", line 178, in format
    context = _update_record_with_context(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/formatters.py", line 56, in _update_record_with_context
    d = _dictify_context(context)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/formatters.py", line 31, in _dictify_context
    context = context.to_dict()
  File "/opt/stack/nova/nova/context.py", line 157, in to_dict
    values.update({'user_id': self.user_id,
AttributeError: 'RequestContext' object has no attribute 'user_id'

[Davanum Srinivas (DIMS) (dims-v)]

Hi, will be fixed in https://review.openstack.org/#/c/160535/