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Windows Server 2019 Shared Nothing Live Migration - Single Error Event ID 21024

Dave Baddorf 101 Reputation points
2020-11-23T19:32:46.563+00:00

Hello!

I am trying to get a Shared-nothing Live Migration working between a Windows Server 2019 Hyper-V Server and a Hyper-V 2019 server (Not running full Windows). These two hosts are not in a cluster.

I am getting an error message "There was an error during move operation. Virtual machine migration operation failed at migration source". The only event that I can find is in the "Hyper-V VMMS - Admin" log and it is Event ID 21024 "Virtual machine migration operation for <VM> failed at migration source <host>". No other messages.

I am getting this same error on multiple VM's, and whether I am using CredSSP or Kerberos (using Constrained Delegation).

I even tried removing the Hyper-V 2019 server from the domain and re-configuring Constrained Delegation.

Does anyone have any suggestions for me to try? If so, I would really appreciate it!

Dave

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
3,797 questions
Hyper-V
Hyper-V
A Windows technology providing a hypervisor-based virtualization solution enabling customers to consolidate workloads onto a single server.
2,735 questions
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  1. Ben Krause 81 Reputation points
    2024-06-29T12:48:15.2766667+00:00

    I also was running into issues with this. My solution was to change the memory of the virtual machine from 16GB to 8GB and then the live migration was able to work!

    Also, some things I check when doing a live migration is

    • Check that the name of the virtual network cards match on the old server and new server (this might be fixed by MS now though)
    • Make sure there are no ISO or CD's attached to the virtual machine
    • Make sure that the Processor compatibility section is checked for "migrate to a physical computer with a different processor version"
    • ensure there are no shadow checkpoints by running the following hyper v powershell command Get-VM | ForEach-Object { $_ | Get-VMSnapshot } If it finds snapshots, run this command Get-VM | Get-VMSnapshot | Remove-VMSnapshot -Confirm:$false
    1 person found this answer helpful.
  2. Anonymous
    2020-11-23T20:07:37.817+00:00
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  3. Dave Baddorf 101 Reputation points
    2020-11-23T20:33:44.32+00:00

    Thanks for the feedback. I had reviewed both of these posts before asking my question and I don't believe that either is applicable to me. One one posting deals with Group Policy failure (which I'm not seeing evidence of) and the other post dealt with a problem where Constrained Delegation wasn't configured correctly.

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  4. Anonymous
    2020-11-23T20:41:24.433+00:00

    Maybe this one.
    https://learn.microsoft.com/en-us/troubleshoot/windows-server/virtualization/troubleshoot-live-migration-issues#event-id-21024

    --please don't forget to Accept as answer if the reply is helpful--

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  5. Dave Baddorf 101 Reputation points
    2020-11-23T20:43:10.557+00:00

    Saw that one too. The migration never starts - it fails instantaneously.

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