I saw your message on the website http://lists.openstack.org/pipermail/openstack-discuss/2019-April/005635.html . And i have been troubled by the same problem for a long time . I tried to change the parameters resume_guests_state_on_host_boot=True and instance_usage_audit=True in the nova.conf ,but it didn't work . I wonder if you have solved this problem, looking forward your reply, Thank you and best regards. And my instance error looks like this . [cid:e8770762-d2b2-4630-9ce6-4d357dc92cee] -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20200925/ea7d07cc/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: 2020-09-25_114323.png Type: image/png Size: 16879 bytes Desc: 2020-09-25_114323.png URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20200925/ea7d07cc/attachment-0001.png>