did you restart your nfs service or reboot your nfs host during the upgrade
progress ?
if you did, what's the webadmin portal's storage domain's status at the
time ?

what i'm suspecting is that you were restarting nfs while ovirt-engine is
using it.

2017-05-11 2:02 GMT+08:00 Jason Keltz <j...@cse.yorku.ca>:

> Hi.
> I recently upgraded my oVirt infrastructure to the latest
>, which went smoothly.  Thanks oVirt team! This
> morning, I upgraded my NFS file server which manages the storage domain.  I
> stopped ovirt engine, did a yum update to bring the server from its older
> CentOS 7.2 release to CentOS 7.3, rebooted it, then restarted engine.   At
> that point, engine was unhappy because our 4 virtualization hosts had a
> total of 30 VMs all waiting to reconnect to storage.  The status of all the
> VMs went to unknown in engine.  It took almost 2 hours before everything
> was completely normal again.  It seems that the hosts were available long
> before engine updated status.  I'm assuming it's better to restart engine
> when I know that NFS has resumed on all the 30 virtalized hosts.  However,
> it's hard to know when that's happened, without trying to connect manually
> to all the hosts.  Is there a way to warn engine that you're about to mess
> with the storage domain, and you don't want it to do anything drastic? Sort
> of like a "maintenance mode" for storage?    I would hate for it to start
> trying to power off hosts via power management or migrate hosts when it
> just needs to wait a bit...
> Thanks!
> Jason.
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