Comment 2 for bug 1194921

Example traceback from the failure:

======================================================================
FAIL: tests.api.v2.test_impl_sqlalchemy.TestAPIAcl.test_with_non_admin
tags: worker-0
----------------------------------------------------------------------
pythonlogging:'': {{{
Starting keystone auth_token middleware
Using /tmp/keystone-signing-6K5T0c as cache directory for signing certificate
Using fake.cache memcache for caching token
}}}

Traceback (most recent call last):
  File "/opt/stack/ceilometer/tests/api/v2/acl.py", line 175, in test_with_non_admin
    'value': 'project-good',
  File "/opt/stack/ceilometer/tests/api/v2/acl.py", line 114, in get_json
    **params)
  File "/opt/stack/ceilometer/ceilometer/tests/api.py", line 164, in get_json
    expect_errors=expect_errors)
  File "/opt/stack/ceilometer/.tox/py27/local/lib/python2.7/site-packages/webtest/app.py", line 199, in get
    expect_errors=expect_errors)
  File "/opt/stack/ceilometer/.tox/py27/local/lib/python2.7/site-packages/webtest/app.py", line 467, in do_request
    res = req.get_response(app, catch_exc_info=True)
  File "/opt/stack/ceilometer/.tox/py27/local/lib/python2.7/site-packages/webob/request.py", line 1292, in send
    application, catch_exc_info=True)
  File "/opt/stack/ceilometer/.tox/py27/local/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/opt/stack/ceilometer/.tox/py27/local/lib/python2.7/site-packages/webtest/lint.py", line 198, in lint_app
    iterator = application(environ, start_response_wrapper)
  File "/opt/stack/ceilometer/.tox/py27/local/lib/python2.7/site-packages/keystoneclient/middleware/auth_token.py", line 459, in __call__
    token_info = self._validate_user_token(user_token)
  File "/opt/stack/ceilometer/.tox/py27/local/lib/python2.7/site-packages/keystoneclient/middleware/auth_token.py", line 710, in _validate_user_token
    self._cache_store_invalid(user_token)
  File "/opt/stack/ceilometer/.tox/py27/local/lib/python2.7/site-packages/keystoneclient/middleware/auth_token.py", line 961, in _cache_store_invalid
    self._cache_store(token, 'invalid')
  File "/opt/stack/ceilometer/.tox/py27/local/lib/python2.7/site-packages/keystoneclient/middleware/auth_token.py", line 928, in _cache_store
    timeout=self.token_cache_time)
TypeError: set() got an unexpected keyword argument 'timeout'