Hello,
I had 3-node Hyper-V Cluster on Windows 2016 DTC. I decided to upgrade this cluster to Windows 2019 DTC version. I evicted first node from cluster, reinstalled to W2019 and added back to cluster. I tried live migration of some VM to this new node and everything
was ok. Then I reinstalled second node (same procedure), then I want to reinstall third node, I migrated VM from third 2016 node to the new nodes and I see that two VM are periodically unexpectly restarting and there is error in Hyper-V event log:
Hyper-V-Worker - EventID: 18560
'VMNAME' was reset because an unrecoverable error occurred on a virtual processor that caused a triple fault. If the problem persists, contact Product Support. (Virtual machine ID B2464510-3CCD-4A42-9776-2A61A3A5F40B)
Both virtual machines are Windows 2016 STD with latest updates. When I move this VMs to old Windows 2016 node, everything is working ok. When I move it back to new 2019 node, in a few minutes are restarting (VM starts, few minutes is working ok, then restart, start, few minutes ok, .............).
I found some bug solution for 18560 error - http://www.checkyourlogs.net/?p=59953 - but it's not my case because my VMs are booting ok.