Description of problem:

When running ceilometer sample-list i get the following error:

[stack@ospd2 ~ (overcloud-site2)] $ ceilometer --debug sample-list
DEBUG (session) REQ: curl -g -i -X GET http://10.0.14.20:5000/v2.0/ -H "Accept: application/json" -H "User-Agent: python-keystoneclient"
INFO (connectionpool) Starting new HTTP connection (1): 10.0.14.20
DEBUG (connectionpool) "GET /v2.0/ HTTP/1.1" 200 336
DEBUG (session) RESP: [200] content-length: 336 vary: X-Auth-Token connection: keep-alive date: Tue, 08 Sep 2015 01:21:48 GMT content-type: application/json x-openstack-request-id: req-9949e5fd-ab78-423c-b38f-3172fd20f76a
RESP BODY: {"version": {"status": "stable", "updated": "2014-04-17T00:00:00Z", "media-types": [{"base": "application/json", "type": "application/vnd.openstack.identity-v2.0+json"}], "id": "v2.0", "links": [{"href": "http://10.0.14.20:5000/v2.0/", "rel": "self"}, {"href": "http://docs.openstack.org/", "type": "text/html", "rel": "describedby"}]}}

DEBUG (v2) Making authentication request to http://10.0.14.20:5000/v2.0/tokens
DEBUG (connectionpool) "POST /v2.0/tokens HTTP/1.1" 200 4303
DEBUG (client) REQ: curl -g -i -X 'GET' 'http://10.0.14.20:8777/v2/samples' -H 'User-Agent: ceilometerclient.openstack.common.apiclient' -H 'X-Auth-Token: {SHA1}9ebecaa3b61611b162c3e21004365e345e25c635'
INFO (connectionpool) Starting new HTTP connection (1): 10.0.14.20
Traceback (most recent call last):
  File "/usr/bin/ceilometer", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/site-packages/ceilometerclient/shell.py", line 297, in main
    CeilometerShell().main(args)
  File "/usr/lib/python2.7/site-packages/ceilometerclient/shell.py", line 246, in main
    args.func(client, args)
  File "/usr/lib/python2.7/site-packages/ceilometerclient/v2/shell.py", line 134, in do_sample_list
    return _do_sample_list(cc, args)
  File "/usr/lib/python2.7/site-packages/ceilometerclient/v2/shell.py", line 160, in _do_sample_list
    samples = cc.new_samples.list(**fields)
  File "/usr/lib/python2.7/site-packages/ceilometerclient/v2/samples.py", line 75, in list
    return self._list(options.build_url("/v2/samples", q, params))
  File "/usr/lib/python2.7/site-packages/ceilometerclient/common/base.py", line 68, in _list
    resp = self.api.get(url)
  File "/usr/lib/python2.7/site-packages/ceilometerclient/openstack/common/apiclient/client.py", line 355, in get
    return self.client_request("GET", url, **kwargs)
  File "/usr/lib/python2.7/site-packages/ceilometerclient/openstack/common/apiclient/client.py", line 345, in client_request
    self, method, url, **kwargs)
  File "/usr/lib/python2.7/site-packages/ceilometerclient/openstack/common/apiclient/client.py", line 261, in client_request
    method, self.concat_url(endpoint, url), **kwargs)
  File "/usr/lib/python2.7/site-packages/ceilometerclient/openstack/common/apiclient/client.py", line 189, in request
    resp = self.http.request(method, url, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 465, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 573, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/adapters.py", line 415, in send
    raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', BadStatusLine("''",))

This happens after 60 seconds.

Version-Release number of selected component (if applicable):


How reproducible:
Happens every time.

Steps to Reproduce:
1. load up ceilometer with a lot of samples
2. run ceilometer sample-list
3.

Actual results:
requests.exceptions.ConnectionError: ('Connection aborted.', BadStatusLine("''",))

Expected results:
A list of all samples

Additional info: