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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

The compute API code is wrong in stable/newton, but we don't need to fix
it there because we didn't actually populate cell0 in Newton. We started
creating instances in cell0 in Ocata:

https://github.com/openstack/nova/commit/bcbfee183e74f696085fcd5c18aff333fc5f1403

So in Newton you'll always get a MarkerNotFound looking in cell0 since
it's always empty.

** Changed in: nova/newton
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1689692

Title:
  MarkerNotFound when limit>num(instances) and marker starts in cell0

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) newton series:
  Invalid
Status in OpenStack Compute (nova) ocata series:
  In Progress

Bug description:
  In my Ocata/RDO enviroment, nova version is 15.0.3, if I list
  instances with a marker&limit, sometimes it says "maker not found".

  More details of my operation steps:

  First, all instances are listed here without limit&marker:

  [root@host015 astute(keystone_admin)]# nova list --sort created_at:desc
  +--------------------------------------+------+--------+------------+-------------+----------+
  | ID                                   | Name | Status | Task State | Power State | Networks |
  +--------------------------------------+------+--------+------------+-------------+----------+
  | 0e02233c-6c73-4bbe-bede-299ba41f44c3 | 11   | ERROR  | -          | NOSTATE     |          |
  | f6347ddb-e870-447f-8f14-3e3b57a610f2 | 11   | ERROR  | -          | NOSTATE     |          |
  | 5de9524f-1167-4ccb-b13c-13acf5435ead | 11   | ERROR  | -          | NOSTATE     |          |
  | 0548ebed-f0e4-4233-acf3-0339c4802f0d | 11   | ERROR  | -          | NOSTATE     |          |
  | 2c9ee616-eab9-4a4a-af3c-79f858c571d5 | 11   | ERROR  | -          | NOSTATE     |          |
  | 9aab5d6a-f5bd-459b-bb25-c04bc56efcf0 | 11   | ERROR  | -          | NOSTATE     |          |
  | f9ca1f1c-01f3-41a5-a68b-63f01fd87081 | 11   | ERROR  | -          | NOSTATE     |          |
  | dbb3955a-c768-4883-aae4-f3143f7b3a51 | 11   | ERROR  | -          | NOSTATE     |          |
  | a587dc5c-54c8-432b-9e38-174aae5e848c | 11   | ERROR  | -          | NOSTATE     |          |
  | 609ba5ca-bc49-4de5-be7a-16aab8fcb6d2 | 11   | ERROR  | -          | NOSTATE     |          |
  | b42e32e5-2aaa-46ee-b0bf-b08f29867af1 | 11   | ERROR  | -          | NOSTATE     |          |
  +--------------------------------------+------+--------+------------+-------------+----------+

  
  Then, I try to list with the first instance id as marker, limited to 3, it's OK: 

  [root@host015 astute(keystone_admin)]# nova list --sort created_at:desc --limit 3 --marker 0e02233c-6c73-4bbe-bede-299ba41f44c3
  +--------------------------------------+------+--------+------------+-------------+----------+
  | ID                                   | Name | Status | Task State | Power State | Networks |
  +--------------------------------------+------+--------+------------+-------------+----------+
  | f6347ddb-e870-447f-8f14-3e3b57a610f2 | 11   | ERROR  | -          | NOSTATE     |          |
  | 5de9524f-1167-4ccb-b13c-13acf5435ead | 11   | ERROR  | -          | NOSTATE     |          |
  | 0548ebed-f0e4-4233-acf3-0339c4802f0d | 11   | ERROR  | -          | NOSTATE     |          |
  +--------------------------------------+------+--------+------------+-------------+----------+

  
  Then, I try to list with another instance, limited to 3, it's error: 

  [root@host015 astute(keystone_admin)]# nova list --sort created_at:desc --limit 3 --marker a587dc5c-54c8-432b-9e38-174aae5e848c
  ERROR (BadRequest): marker [a587dc5c-54c8-432b-9e38-174aae5e848c] not found (HTTP 400) (Request-ID: req-308371f4-2962-4f3f-8d4c-69bf8c19664f)

  
  That's because no enough instance of limitation after the marker?
  When I set limitation to 2, it's OK:

  [root@host015 astute(keystone_admin)]# nova list --sort created_at:desc --limit 2 --marker a587dc5c-54c8-432b-9e38-174aae5e848c
  +--------------------------------------+------+--------+------------+-------------+----------+
  | ID                                   | Name | Status | Task State | Power State | Networks |
  +--------------------------------------+------+--------+------------+-------------+----------+
  | 609ba5ca-bc49-4de5-be7a-16aab8fcb6d2 | 11   | ERROR  | -          | NOSTATE     |          |
  | b42e32e5-2aaa-46ee-b0bf-b08f29867af1 | 11   | ERROR  | -          | NOSTATE     |          |
  +--------------------------------------+------+--------+------------+-------------+----------+

  My question: Why does not limitation work when no enough instance ?

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