Comment 11 for bug 1647464

Yeah the problem is cell0:

http://logs.openstack.org/05/407205/1/check/gate-novaclient-dsvm-functional-identity-v3-only-ubuntu-xenial-nv/61e9a05/logs/screen-n-api.txt.gz#_2016-12-06_20_58_54_417

2016-12-06 20:58:54.417 27543 ERROR nova.compute.api [req-de260414-aacf-47c4-949b-0b501efa5e69 admin admin] Failed to find instance by marker fe05d5ed-e97a-48c3-a57f-fb8a05f43d88 in cell0; ignoring
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api Traceback (most recent call last):
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/opt/stack/new/nova/nova/compute/api.py", line 2404, in get_all
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api sort_dirs=sort_dirs)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/opt/stack/new/nova/nova/compute/api.py", line 2483, in _get_instances_by_filters
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api expected_attrs=fields, sort_keys=sort_keys, sort_dirs=sort_dirs)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 184, in wrapper
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api result = fn(cls, context, *args, **kwargs)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/opt/stack/new/nova/nova/objects/instance.py", line 1219, in get_by_filters
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api use_slave=use_slave, sort_keys=sort_keys, sort_dirs=sort_dirs)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/opt/stack/new/nova/nova/db/sqlalchemy/api.py", line 226, in wrapper
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api return f(*args, **kwargs)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/opt/stack/new/nova/nova/objects/instance.py", line 1203, in _get_by_filters_impl
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api sort_keys=sort_keys, sort_dirs=sort_dirs)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/opt/stack/new/nova/nova/db/api.py", line 763, in instance_get_all_by_filters_sort
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api sort_dirs=sort_dirs)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/opt/stack/new/nova/nova/db/sqlalchemy/api.py", line 170, in wrapper
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api return f(*args, **kwargs)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/opt/stack/new/nova/nova/db/sqlalchemy/api.py", line 271, in wrapped
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api return f(context, *args, **kwargs)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api File "/opt/stack/new/nova/nova/db/sqlalchemy/api.py", line 2243, in instance_get_all_by_filters_sort
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api raise exception.MarkerNotFound(marker=marker)
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api MarkerNotFound: Marker fe05d5ed-e97a-48c3-a57f-fb8a05f43d88 could not be found.
2016-12-06 20:58:54.417 27543 ERROR nova.compute.api

So we just need to handle that MarkerNotFound and ignore it when listing instances.