My guess is as follows: In nova, if the record of the marker VM instance exists in the cell but the 'cell_mapping' in the InstanceMapping of the marker VM instance is null (None), the issue occurs.
https://github.com/openstack/nova/blob/f902e0d5d87fb05207e4a7aca73d185775d43df2/nova/compute/instance_list.py#L56-L73 -------------------------------------------------------------------------- def get_marker_record(self, ctx, marker): try: im = objects.InstanceMapping.get_by_instance_uuid(ctx, marker) except exception.InstanceMappingNotFound: raise exception.MarkerNotFound(marker=marker) elevated = ctx.elevated(read_deleted='yes') with context.target_cell(elevated, im.cell_mapping) as cctx: try: # NOTE(danms): We query this with no columns_to_join() # as we're just getting values for the sort keys from # it and none of the valid sort keys are on joined # columns. db_inst = db.instance_get_by_uuid(cctx, marker, columns_to_join=[]) except exception.InstanceNotFound: raise exception.MarkerNotFound(marker=marker) <------ Here return db_inst -------------------------------------------------------------------------- In nova-conductor, the record of the VM instance exists in the cell but the 'cell_mapping' in the InstanceMapping of the VM instance is null (None) between *1 and *2. *1: https://github.com/openstack/nova/blob/f902e0d5d87fb05207e4a7aca73d185775d43df2/nova/conductor/manager.py#L1172-L1175 *2: https://github.com/openstack/nova/blob/f902e0d5d87fb05207e4a7aca73d185775d43df2/nova/conductor/manager.py#L1236-L1239 ** Tags added: cells ** Project changed: python-novaclient => nova -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1773945 Title: nova client servers.list crashes with bad marker Status in OpenStack Compute (nova): New 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) To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1773945/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
