I've had situations where the engine UI wouldn't update for shutdown/startups of VMs which were resolved after ssh-ing into the engine VM and running systemctl restart ovirt-engine.service.  running engine-setup was also used on occasion and cleared out old tasks.

On Fri, Sep 18, 2020 at 1:26 AM Gilboa Davara <gilboad@gmail.com> wrote:
Hello all (and happy new year),

(Note: Also reported as https://bugzilla.redhat.com/show_bug.cgi?id=1880251)

Self hosted engine, single node, NFS.
Attempted to install CentOS over an existing Fedora VM with one host
device (USB printer).
Reboot failed, trying to boot from a non-existent CDROM.
Tried shutting the VM down, failed.
Tried powering off the VM, failed.
Dropped cluster to global maintenance, reboot host + engine (was
planning to upgrade it anyhow...), VM still stuck.

When trying to power off the VM, the following message can be found
the in engine.log:
2020-09-18 07:58:51,439+03 INFO
[org.ovirt.engine.core.bll.StopVmCommand]
(EE-ManagedThreadFactory-engine-Thread-42)
[7bc4ac71-f0b2-4af7-b081-100dc99b6123] Running command: StopVmCommand
internal: false. Entities affected :  ID:
b411e573-bcda-4689-b61f-1811c6f03ad5 Type: VMAction group STOP_VM with
role type USER
2020-09-18 07:58:51,441+03 WARN
[org.ovirt.engine.core.bll.StopVmCommand]
(EE-ManagedThreadFactory-engine-Thread-42)
[7bc4ac71-f0b2-4af7-b081-100dc99b6123] Strange, according to the
status 'RebootInProgress' virtual machine
'b411e573-bcda-4689-b61f-1811c6f03ad5' should be running in a host but
it isn't.
2020-09-18 07:58:51,594+03 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(EE-ManagedThreadFactory-engine-Thread-42)
[7bc4ac71-f0b2-4af7-b081-100dc99b6123] EVENT_ID:
USER_FAILED_STOP_VM(56), Failed to power off VM kids-home-srv (Host:
<UNKNOWN>, User: gilboa@internal-authz).

My question is simple: Pending a solution to the bug, can I somehow
drop the state of the VM? It's currently holding a sizable disk image
and a USB device I need (printer).

As it's my private VM cluster, I have no problem dropping the site
completely for maintenance.

Thanks,

Gilboa
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