2018-02-06 22:03:31,401 INFO zuul.nodepool: Setting nodeset <NodeSet OrderedDict([(('ubuntu-xenial',), <Node 0002402903 ['ubuntu-xenial']:ubuntu-xenial>)])OrderedDict()> in use
2018-02-06 22:03:31,403 ERROR zuul.Pipeline.openstack.gate: Exception while executing job openstack-tox-pep8 for change <Change 0x7f4d93187438 526171,3>:
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/zuul/manager/__init__.py", line 394, in _executeJobs
    self.sched.nodepool.useNodeSet(nodeset)
  File "/usr/local/lib/python3.5/dist-packages/zuul/nodepool.py", line 114, in useNodeSet
    self.sched.zk.storeNode(node)
  File "/usr/local/lib/python3.5/dist-packages/zuul/zk.py", line 213, in storeNode
    self.client.set(path, self._dictToStr(node.toDict()))
  File "/usr/local/lib/python3.5/dist-packages/kazoo/client.py", line 1242, in set
    return self.set_async(path, value, version).get()
  File "/usr/local/lib/python3.5/dist-packages/kazoo/handlers/utils.py", line 79, in get
    raise self._exception
kazoo.exceptions.NoNodeError