Another similar trace at http://logs.openstack.org/53/76053/13/check/check-tempest-dsvm-full/e425b78/console.html :

2014-07-30 22:24:08.194 | Requirement already up-to-date: jsonschema>=2.0.0,<3.0.0 in /usr/local/lib/python2.7/dist-packages (from tempest==2.dev714.g4d90d67)
2014-07-30 22:24:08.194 | http://pypi.openstack.org/simple/testtools/ uses an insecure transport scheme (http). Consider using https if pypi.openstack.org has it available
2014-07-30 22:24:08.194 | Requirement already up-to-date: testtools>=0.9.34 in /usr/local/lib/python2.7/dist-packages (from tempest==2.dev714.g4d90d67)
2014-07-30 22:24:08.195 | http://pypi.openstack.org/simple/lxml/ uses an insecure transport scheme (http). Consider using https if pypi.openstack.org has it available
2014-07-30 22:24:08.195 | Downloading/unpacking lxml>=2.3 from http://pypi.openstack.org/packages/source/l/lxml/lxml-3.3.5.tar.gz#md5=88c75f4c73fc8f59c9ebb17495044f2f (from tempest==2.dev714.g4d90d67)
2014-07-30 22:24:08.195 | Cleaning up...
2014-07-30 22:24:08.195 | Exception:
2014-07-30 22:24:08.195 | Traceback (most recent call last):
2014-07-30 22:24:08.195 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/basecommand.py", line 122, in main
2014-07-30 22:24:08.195 |     status = self.run(options, args)
2014-07-30 22:24:08.195 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/commands/install.py", line 278, in run
2014-07-30 22:24:08.195 |     requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
2014-07-30 22:24:08.195 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/req.py", line 1197, in prepare_files
2014-07-30 22:24:08.195 |     do_download,
2014-07-30 22:24:08.195 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/req.py", line 1375, in unpack_url
2014-07-30 22:24:08.196 |     self.session,
2014-07-30 22:24:08.196 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/download.py", line 546, in unpack_http_url
2014-07-30 22:24:08.196 |     resp = session.get(target_url, stream=True)
2014-07-30 22:24:08.196 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 468, in get
2014-07-30 22:24:08.196 |     return self.request('GET', url, **kwargs)
2014-07-30 22:24:08.196 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/download.py", line 237, in request
2014-07-30 22:24:08.196 |     return super(PipSession, self).request(method, url, *args, **kwargs)
2014-07-30 22:24:08.196 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 456, in request
2014-07-30 22:24:08.196 |     resp = self.send(prep, **send_kwargs)
2014-07-30 22:24:08.196 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 559, in send
2014-07-30 22:24:08.196 |     r = adapter.send(request, **kwargs)
2014-07-30 22:24:08.197 |   File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py", line 384, in send
2014-07-30 22:24:08.197 |     raise Timeout(e, request=request)
2014-07-30 22:24:08.197 | Timeout: HTTPConnectionPool(host='pypi.openstack.org', port=80): Read timed out. (read timeout=15)