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This has been seen to occur in the following scenarios:
To resolve this issue, ensure a default gateway is defined on one of the cluster NICs on each node that have a compliant status in VMM on the Hyper-V hosts.
If the problem is not resolved, consider increasing the HelperHostConnectRetryCount from the default of 5 to a larger value such as 10. This will effectively increase the timeout from 10 seconds to 50 seconds.
Warning: Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
For Windows Server 2008 R2
HKLM\Software\Microsoft\ Microsoft System Center Virtual Machine Manager Server\Settings
2. Click on Edit, and then New - DWORD Value.
3. Rename the value to HelperHostConnectRetryCount
4. Right click on HelperHostConnectRetryCount and then click Modify.
5. In the Edit DWORD Value dialog box, type 10 in the Value data box, select Base of Decimal and then click OK.
6. Quit Registry Editor
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.
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