On 11/13/2019 11:17 AM, Eric Fried wrote: > Unless it's likely to be something other than NoValidHost a significant > percentage of the time, IMO it... Well just taking resize, it could be one of many things: https://github.com/openstack/nova/blob/20.0.0/nova/conductor/manager.py#L366 - oops you tried resizing which would screw up your group affinity policy https://github.com/openstack/nova/blob/20.0.0/nova/compute/manager.py#L4490 - (for an admin, cold migrate) oops you tried cold migrating a vcenter vm or you have allow_resize_to_same_host=True and the scheduler picks the same host (silly scheduler, see bug 1748697) https://github.com/openstack/nova/blob/20.0.0/nova/compute/claims.py#L113 - oops you lost a resource claims race, try again https://github.com/openstack/nova/blob/20.0.0/nova/scheduler/client/report.py#L1898 - oops you lost a race with allocation consumer generation conflicts, try again -- Thanks, Matt