"Could not fetch data needed for VM migrate operation" when trying to migrate a VM

[dupondje]

Hi,
I got the following error when trying to migrate vms between hosts: "Could not fetch data needed for VM migrate operation
" , i guess it's related to the above monitoring problem.
Any workaround for this? or for the monitoring problem?
Thanks!

Originally posted by @zilkanir in #78

[zilkanir]

OK, I tried now to migrate vms and it's working (about 24h after the failures).
The scenario was that I put 2 nodes on maintanace (4 nodes cluster), and when they were back to Active state , after few minutes I was unable to move vms back to them.
The errors i saw on engine logs are:
2026-02-01 10:57:15,974+02 ERROR [org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] (SSL Stomp Reactor) [] Connection timeout for host 'ip-node-1', last response arrived 22501 ms ago.
2026-02-01 10:57:22,288+02 ERROR [org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] (SSL Stomp Reactor) [] Connection timeout for host 'ip-node-2', last response arrived 22501 ms ago.
2026-02-01 11:28:32,858+02 ERROR [org.ovirt.engine.core.bll.MaintenanceVdsCommand] (default task-17) [44de4eb6] Failed to migrate one or more VMs.
2026-02-01 11:36:07,703+02 ERROR [org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] (SSL Stomp Reactor) [] Connection timeout for host 'ip-node-3', last response arrived 22501 ms ago.
2026-02-01 11:36:11,378+02 ERROR [org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] (SSL Stomp Reactor) [] Connection timeout for host 'ip-node-4', last response arrived 22501 ms ago.

The cluster is with new version on Rocky 10.1:
engine

[root@ovisp ~]# rpm -q ovirt-engine
ovirt-engine-4.5.7-1.el10.noarch
[root@ovisp ~]#

nodes

[root@ovsvmisp1 ~]# rpm -q vdsm
vdsm-4.50.6.1-1.el10.x86_64
[root@ovsvmisp1 ~]#
[root@ovsvmisp1 ~]# rpm -q ovirt-host
ovirt-host-4.5.1-1.el10.x86_64
[root@ovsvmisp1 ~]#

I'm using ovirt many years and didn't see this kind of errors with previous versions.

Thanks.