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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

Revert https://review.openstack.org/#/c/572539/

** Also affects: python-novaclient
   Importance: Undecided
       Status: New

** Tags added: api

** Changed in: python-novaclient
       Status: New => In Progress

** Changed in: python-novaclient
   Importance: Undecided => Medium

** Changed in: python-novaclient
     Assignee: (unassigned) => Matt Riedemann (mriedem)

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https://bugs.launchpad.net/bugs/1773945

Title:
  nova client servers.list crashes with bad marker

Status in OpenStack Compute (nova):
  New
Status in python-novaclient:
  In Progress

Bug description:
  We have a python script that called servers.list() on an instance of
  novaclient.v2.client.Client . Sometimes that raises a "BadRequest
  marker not found" exception:

  Our call:

    client = nova_client.Client("2", session=some_session)
    client.servers.list()

  Observed Stacktrace:

    File "/usr/lib/python2.7/site-packages/XXXX/XXXX.py", line 630, in XXXX:
      all_servers = self.nova.servers.list()
    File "/usr/lib/python2.7/site-packages/novaclient/v2/servers.py", line 854, in list
      "servers")
    File "/usr/lib/python2.7/site-packages/novaclient/base.py", line 257, in _list
      resp, body = self.api.client.get(url)
    File "/usr/lib/python2.7/site-packages/keystoneauth1/adapter.py", line 304, in get
      return self.request(url, 'GET', **kwargs)
    File "/usr/lib/python2.7/site-packages/novaclient/client.py", line 83, in request
      raise exceptions.from_response(resp, body, url, method)
  BadRequest: marker [6a91d602-ab6e-42e0-929e-5ec33df2ddef] not found (HTTP 400) (Request-ID: req-78827725-801d-4514-8cc8-e4b94f15c191)

  Discussion:

  We have a lot of stacks and we sometimes create multiple stacks at the same time. We've noticed that that the stacks with the mentioned UUIDs were created just before these errors occur. It seems that when a newly-created stack appears at a certain location in the server list, its UUID is used as a marker, but the code that validates the marker does
  not recognize such stacks.

  Relevant versions:

  - python-novaclient (9.1.0)
  - nova (16.0.0)

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