My experience with Microsoft technology

My experience with Microsoft technology

Hyper-V Live Migration Issue EventID 22506

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Today I troubleshooted a strange issue regarding Live Migration. The customer built a new Hyper-V Cluster but as soon as they tried to live\quick migrate a VM with two network adapters it failed. After checking what they had done I couldn’t find any configuration errors. The relevant message from the Hyper-V High-Availability Log is:

EventID 22506

Migration failed at target for cluster resource ‘Virtual Machine LM Test’ with events ”Virtual Machine LM Test’ live migration did not succeed at the destination.

‘Virtual Machine LM Test’ failed to start.

Live migration of ‘LM Test’ did not succeed. (Virtual machine ID 78DB1ACB-2F30-4FC5-ACB6-1E46607559B8)

‘LM Test’ Microsoft Synthetic Ethernet Port (Instance ID {6B7A9C4E-8B80-4B9A-A069-92DB96367493}): Failed to restore with Error ‘The system cannot find the path specified.’ (0x80070003). (Virtual machine ID 78DB1ACB-2F30-4FC5-ACB6-1E46607559B8)

After searching the net we followed a suggestion to remove the VM from the cluster and add it again. This fixed the problem.

I tried to reconstruct the problem on a different cluster because I never encountered this before. Here is what I did and what I found out:

LM1

I created a new VM with one network interface using cluster manager.

LM2

Live migration was working fine.

LM3

To add a second NIC I clicked on “manage virtual machine” which opened the Hyper-V Manager.

LM4

I added a NIC and connected it to the second external network.

LM5

Live migration failed again. Seems like a pattern.

LM6

After deleting the VM in cluster manager, it is still available in Hyper-V Manager.

LM7

I added it again using the High Availability Wizard in the cluster manager.

LM8

Live Migration succeeded afterwards. There is definitively a pattern. Let’s try if the error persists if we use cluster manager exclusively.

LM9

I created a new VM.

LM10

 

I opened the VM settings using the Actions Pane

LM11

I added a NIC and connected it to the second external network.

LM12

Live Migration succeeded.

Conclusion

  1. Use cluster manager exclusively
  2. If you used Hyper-V Manager by mistake, remove the VM from the cluster and add it again.

Regards Alex

P.S. Visit my blog over on SystemCenterCentral for System Center related posts.

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Written by alexanderschmitt

23. November 2011 at 18:56

Posted in Hyper-V

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