TypeError when trying to log-in in a DevStack deployment

I am getting exactly same stack trace.
Googling did not help much.

Appears the problem may be with the devstack build.

Environment:
Ubuntu 12.04.1

DevStack downloaded from devstack.org

Thanks Chuan-Heng Hsiao, that solved my question.

It worked for admin, but demo user continues behaving abnormally.

When trying to log with demo user a 403 Forbidden error will rise.

I'll open a new question for that issue as it not fully related with this.

Still getting same error. You can see the stack trace that logging has been changed to string:
> 103. if hasattr(requests, 'logging'):

Environment:

Request Method: GET
Request URL: http://localhost:8888/admin/

Django Version: 1.4.3
Python Version: 2.7.3
Installed Applications:
['openstack_dashboard',
 'django.contrib.contenttypes',
 'django.contrib.auth',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'compressor',
 'horizon',
 'openstack_dashboard.dashboards.project',
 'openstack_dashboard.dashboards.admin',
 'openstack_dashboard.dashboards.settings',
 'openstack_auth']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'horizon.middleware.HorizonMiddleware',
 'django.middleware.doc.XViewMiddleware',
 'django.middleware.locale.LocaleMiddleware')

Traceback:
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
  111. response = callback(request, *callback_args, **callback_kwargs)
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/decorators.py" in dec
  38. return view_func(request, *args, **kwargs)
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/decorators.py" in dec
  86. return view_func(request, *args, **kwargs)
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/decorators.py" in dec
  54. return view_func(request, *args, **kwargs)
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/decorators.py" in dec
  38. return view_func(request, *args, **kwargs)
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/decorators.py" in dec
  86. return view_func(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/views/generic/base.py" in view
  48. return self.dispatch(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/views/generic/base.py" in dispatch
  69. return handler(request, *args, **kwargs)
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/tables/views.py" in get
  155. handled = self.construct_tables()
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/tables/views.py" in construct_tables
  146. handled = self.handle_table(table)
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/tables/views.py" in handle_table
  118. data = self._get_data_dict()
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/tables/views.py" in _get_data_dict
  182. self._data = {self.table_class._meta.name: self.get_data()}
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../openstack_dashboard/dashboards/admin/overview/views.py" in get_data
  38. data = super(GlobalOverview, self).get_data()
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../openstack_dashboard/usage/views.py" in get_data
  33. self.usage.summarize(*self.usage.get_date_range())
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../openstack_dashboard/usage/base.py" in summarize
  98. _('Unable to retrieve usage information.'))
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../openstack_dashboard/usage/base.py" in summarize
  95. self.usage_list = self.get_usage_list(start, end)
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../openstack_dashboard/usage/base.py" in get_usage_list
  130. return api.nova.usage_list(self.request, start, end)
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../openstack_dashboard/api/nova.py" in usage_list
  463. novaclient(request).usage.list(start, end, True)]
File "/opt/stack/horizon/openstack_dashboard/wsgi/../../openstack_dashboard/api/nova.py" in novaclient
  261. http_log_debug=settings.DEBUG)
File "/opt/stack/python-novaclient/novaclient/v1_1/client.py" in __init__
  146. cacert=cacert)
File "/opt/stack/python-novaclient/novaclient/client.py" in __init__
  103. if hasattr(requests, 'logging'):

Exception Type: TypeError at /admin/
Exception Value: hasattr(): attribute name must be string

I just created a bug-report to the devs.

The temporary solution here should be reported to the devs.
They will solve this issue soon.

Sunil:

Maybe you need to do unstack.sh first, and then do stack.sh to restart the stack.

Thanks a ton, that did resolve the problem.

Just a curious question, is there a better way than unstack.sh,
I tried many scripts to stop and start the devstack but none worked.

Is there a clean way to restart the devstack.