Seeing something a bit different here:

http://logs.openstack.org/06/102006/9/check/gate-nova-python26/49e6d5f/console.html

2014-07-23 16:40:43.226 | Downloading/unpacking pbr>=0.6,!=0.7,<1.0 (from nova==2014.2.dev3.gecfe94d)
2014-07-23 16:40:43.226 | Cleaning up...
2014-07-23 16:40:43.227 | Exception:
2014-07-23 16:40:43.227 | Traceback (most recent call last):
2014-07-23 16:40:43.227 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/basecommand.py", line 122, in main
2014-07-23 16:40:43.227 |     status = self.run(options, args)
2014-07-23 16:40:43.227 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/commands/install.py", line 278, in run
2014-07-23 16:40:43.227 |     requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
2014-07-23 16:40:43.227 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/req.py", line 1177, in prepare_files
2014-07-23 16:40:43.227 |     url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
2014-07-23 16:40:43.227 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/index.py", line 196, in find_requirement
2014-07-23 16:40:43.227 |     url_name = self._find_url_name(Link(self.index_urls[0], trusted=True), url_name, req) or req.url_name
2014-07-23 16:40:43.227 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/index.py", line 361, in _find_url_name
2014-07-23 16:40:43.228 |     page = self._get_page(index_url, req)
2014-07-23 16:40:43.228 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/index.py", line 568, in _get_page
2014-07-23 16:40:43.228 |     session=self.session,
2014-07-23 16:40:43.228 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/index.py", line 670, in get_page
2014-07-23 16:40:43.228 |     resp = session.get(url, headers={"Accept": "text/html"})
2014-07-23 16:40:43.228 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/_vendor/requests/sessions.py", line 468, in get
2014-07-23 16:40:43.228 |     return self.request('GET', url, **kwargs)
2014-07-23 16:40:43.228 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/download.py", line 237, in request
2014-07-23 16:40:43.228 |     return super(PipSession, self).request(method, url, *args, **kwargs)
2014-07-23 16:40:43.228 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/_vendor/requests/sessions.py", line 456, in request
2014-07-23 16:40:43.228 |     resp = self.send(prep, **send_kwargs)
2014-07-23 16:40:43.229 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/_vendor/requests/sessions.py", line 596, in send
2014-07-23 16:40:43.229 |     r.content
2014-07-23 16:40:43.229 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/_vendor/requests/models.py", line 694, in content
2014-07-23 16:40:43.229 |     self._content = bytes().join(self.iter_content(CONTENT_CHUNK_SIZE)) or bytes()
2014-07-23 16:40:43.229 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/_vendor/requests/models.py", line 627, in generate
2014-07-23 16:40:43.229 |     for chunk in self.raw.stream(chunk_size, decode_content=True):
2014-07-23 16:40:43.229 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/response.py", line 240, in stream
2014-07-23 16:40:43.229 |     data = self.read(amt=amt, decode_content=decode_content)
2014-07-23 16:40:43.229 |   File "/home/jenkins/workspace/gate-nova-python26/.tox/py26/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/response.py", line 187, in read
2014-07-23 16:40:43.229 |     data = self._fp.read(amt)
2014-07-23 16:40:43.229 |   File "/usr/lib64/python2.6/httplib.py", line 522, in read
2014-07-23 16:40:43.230 |     return self._read_chunked(amt)
2014-07-23 16:40:43.230 |   File "/usr/lib64/python2.6/httplib.py", line 580, in _read_chunked
2014-07-23 16:40:43.230 |     value.append(self._safe_read(chunk_left))
2014-07-23 16:40:43.230 |   File "/usr/lib64/python2.6/httplib.py", line 619, in _safe_read
2014-07-23 16:40:43.230 |     chunk = self.fp.read(min(amt, MAXAMOUNT))
2014-07-23 16:40:43.230 |   File "/usr/lib64/python2.6/socket.py", line 383, in read
2014-07-23 16:40:43.230 |     data = self._sock.recv(left)
2014-07-23 16:40:43.230 | timeout: timed out