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[fanzijie <1970087@xxxxxxxxxxxxxxxxxx>]

** Changed in: nova
       Status: Incomplete => Opinion

** Changed in: nova
       Status: Opinion => New

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https://bugs.launchpad.net/bugs/1970087

Title:
  When the rest API gets the server, it returns an empty list. Nova-api
  says Cell "cellid"is not responding and hence is being omitted from
  the results

Status in OpenStack Compute (nova):
  New

Bug description:
  Thank you in advance for seeing this question

  When I view it on Web pages and CLI commands, the instance is fine

  openstack 4.0.2
  train

  nova-api.log
  2022-04-24 17:42:04.142 2487 WARNING nova.compute.multi_cell_list [req-53aa6a4d-61b7-4248-a7e6-b2a5544808e4 db9e37bfd51a4853b045ec98388a2ffb - - default -] Cell 00000000-0000-0000-0000-000000000000 is not responding and hence is being omitted from the results
  2022-04-24 17:42:04.143 2487 WARNING nova.compute.multi_cell_list [req-53aa6a4d-61b7-4248-a7e6-b2a5544808e4 db9e37bfd51a4853b045ec98388a2ffb - - default -] Cell cd67e4f8-daa9-4cf3-a1ee-64a11959f6ad is not responding and hence is being omitted from the results

  When I ask http://control:8774/v2.1/servers/"instance ID" , an error will be reported
  nova-api.log

  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi [req-33b68053-5d7b-42d8-861b-60931ed03100 db9e37bfd51a4853b045ec98388a2ffb - - default -] Unexpected exception in API method: NovaException: Cell cd67e4f8-daa9-4cf3-a1ee-64a11959f6ad is not responding and hence instance info is not available.
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi Traceback (most recent call last):
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/site-packages/nova/api/openstack/wsgi.py", line 671, in wrapped
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi     return f(*args, **kwargs)
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/site-packages/nova/api/openstack/compute/servers.py", line 476, in show
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi     cell_down_support=cell_down_support)
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/site-packages/nova/api/openstack/compute/servers.py", line 379, in _get_server
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi     cell_down_support=cell_down_support)
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/site-packages/nova/api/openstack/common.py", line 473, in get_instance
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi     cell_down_support=cell_down_support)
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 2657, in get
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi     expected_attrs, cell_down_support=cell_down_support)
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 2604, in _get_instance
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi     expected_attrs, cell_down_support)
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 2597, in _get_instance_from_cell
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi     "info is not available.") % cell_uuid)
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi NovaException: Cell cd67e4f8-daa9-4cf3-a1ee-64a11959f6ad is not responding and hence instance info is not available.
  2022-04-24 17:40:10.891 2487 ERROR nova.api.openstack.wsgi
  2022-04-24 17:40:10.913 2487 INFO nova.api.openstack.wsgi [req-33b68053-5d7b-42d8-861b-60931ed03100 db9e37bfd51a4853b045ec98388a2ffb - - default -] HTTP exception

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