Comment 5 for bug 1896463

I can reproduce this easily with adding 10 sec delay between InstanceList.get_by_host_and_node() and MigrationList.get_in_progress_by_host_and_node() [1]

[1] https://github.com/openstack/nova/blob/5645f75d6b3adac00f6be8e0eae4565c4eb2ab5d/nova/compute/resource_tracker.py#L766