release notes job gate failure

2016-11-08 12:17:44.864361 | + tox -v -ereleasenotes
2016-11-08 12:17:45.087922 | using tox.ini: /home/jenkins/workspace/gate-taskflow-releasenotes/tox.ini
2016-11-08 12:17:45.088030 | using tox-2.4.1 from /usr/local/lib/python2.7/dist-packages/tox/__init__.pyc
2016-11-08 12:17:45.088101 | GLOB sdist-make: /home/jenkins/workspace/gate-taskflow-releasenotes/setup.py
2016-11-08 12:17:45.089817 | /home/jenkins/workspace/gate-taskflow-releasenotes$ /usr/bin/python /home/jenkins/workspace/gate-taskflow-releasenotes/setup.py sdist --formats=zip --dist-dir /home/jenkins/workspace/gate-taskflow-releasenotes/.tox/dist >/home/jenkins/workspace/gate-taskflow-releasenotes/.tox/log/tox-0.log
2016-11-08 12:17:46.164261 | releasenotes create: /home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes
2016-11-08 12:17:46.176009 | /home/jenkins/workspace/gate-taskflow-releasenotes/.tox$ /usr/bin/python -m virtualenv --python /usr/bin/python releasenotes >/home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes/log/releasenotes-0.log
2016-11-08 12:17:48.090506 | releasenotes installdeps: .[test,workers,zookeeper,database,redis,eventlet,doc]
2016-11-08 12:17:48.092475 | /home/jenkins/workspace/gate-taskflow-releasenotes$ /home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes/bin/pip install .[test,workers,zookeeper,database,redis,eventlet,doc] >/home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes/log/releasenotes-1.log
2016-11-08 12:18:05.389608 | releasenotes inst: /home/jenkins/workspace/gate-taskflow-releasenotes/.tox/dist/taskflow-2.7.1.dev9.zip
2016-11-08 12:18:05.398216 | /home/jenkins/workspace/gate-taskflow-releasenotes$ /home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes/bin/pip install /home/jenkins/workspace/gate-taskflow-releasenotes/.tox/dist/taskflow-2.7.1.dev9.zip >/home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes/log/releasenotes-2.log
2016-11-08 12:18:07.223717 | /home/jenkins/workspace/gate-taskflow-releasenotes$ /home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes/bin/pip freeze >/home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes/log/releasenotes-3.log
2016-11-08 12:18:07.609934 | releasenotes installed: alabaster==0.7.9,alembic==0.8.8,amqp==1.4.9,anyjson==0.3.3,appdirs==1.4.0,automaton==1.5.0,Babel==2.3.4,cachetools==2.0.0,chardet==2.3.0,contextlib2==0.5.4,debtcollector==1.9.0,decorator==4.0.10,doc8==0.7.0,docutils==0.12,enum34==1.1.6,eventlet==0.19.0,extras==1.0.0,fasteners==0.14.1,fixtures==3.0.0,flake8==2.2.4,funcsigs==1.0.2,functools32==3.2.3.post2,futures==3.0.5,futurist==0.19.0,greenlet==0.4.10,hacking==0.10.2,iso8601==0.1.11,Jinja2==2.8,jsonschema==2.5.1,kazoo==2.2.1,keystoneauth1==2.15.0,kombu==3.0.37,linecache2==1.0.0,Mako==1.0.5,MarkupSafe==0.23,mccabe==0.2.1,mock==2.0.0,monotonic==1.2,mox3==0.18.0,msgpack-python==0.4.8,netaddr==0.7.18,netifaces==0.10.5,networkx==1.11,os-client-config==1.22.0,oslo.i18n==3.10.0,oslo.serialization==2.14.0,oslo.utils==3.18.0,oslosphinx==4.8.0,oslotest==2.11.0,pbr==1.10.0,pep8==1.5.7,positional==1.1.1,prettytable==0.7.2,psycopg2==2.6.2,pydotplus==2.0.2,pyflakes==0.8.1,Pygments==2.1.3,PyMySQL==0.7.9,pyparsing==2.1.10,python-editor==1.0.1,python-mimeparse==1.6.0,python-subunit==1.2.0,pytz==2016.7,PyYAML==3.12,redis==2.10.5,reno==1.8.0,requests==2.11.1,requestsexceptions==1.1.3,restructuredtext-lint==0.17.2,six==1.10.0,snowballstemmer==1.2.1,Sphinx==1.3.6,sphinx-rtd-theme==0.1.9,SQLAlchemy==1.0.15,SQLAlchemy-Utils==0.32.9,stevedore==1.18.0,taskflow==2.7.1.dev9,tenacity==3.3.0,testrepository==0.0.20,testscenarios==0.5.0,testtools==2.2.0,traceback2==1.4.0,unittest2==1.1.0,wrapt==1.10.8,zake==0.2.2
2016-11-08 12:18:07.609988 | releasenotes runtests: PYTHONHASHSEED='1643924832'
2016-11-08 12:18:07.610037 | releasenotes runtests: commands[0] | sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
2016-11-08 12:18:07.611508 | /home/jenkins/workspace/gate-taskflow-releasenotes$ /home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes/bin/sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
2016-11-08 12:18:07.839252 | Running Sphinx v1.3.6
2016-11-08 12:18:07.839344 | making output directory...
2016-11-08 12:18:07.840264 |
2016-11-08 12:18:07.840290 | Exception occurred:
2016-11-08 12:18:07.840799 | File "conf.py", line 66, in <module>
2016-11-08 12:18:07.840829 | ImportError: cannot import name version_info
2016-11-08 12:18:07.842656 | The full traceback has been saved in /tmp/tmp.5dQf7Xx6ST/sphinx-err-M7wCRT.log, if you want to report the issue to the developers.
2016-11-08 12:18:07.842698 | Please also report this if it was a user error, so that a better error message can be provided next time.
2016-11-08 12:18:07.842726 | A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks!
2016-11-08 12:18:07.853663 | ERROR: InvocationError: '/home/jenkins/workspace/gate-taskflow-releasenotes/.tox/releasenotes/bin/sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html'
2016-11-08 12:18:07.853763 | ___________________________________ summary ____________________________________