WINDOWS SERVER 2019 -HYPER-V TRIPLE FAULT BUG
i migrate some VMs from old Hyper-V 2012R2 infrastructure to new 2019 infrastructure, the migration was successful, but on the first reboot of migrated VM the VM wont start. In the event log i found this critical event:
„‚SVR_xxx“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 2F3329E8-5485-4DA3-93D5-A493E9A885A3)„
Workaround is change MAC address from dynamic to static and start VM, in my case the VM not started so i changed the MAC address from static to dynamic and VM started successfuly.
This issue is now resolved in the 2019-05-21 cumulative update (KB4497934)