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Instant clone creation fails with the error "Fault type is UNKNOWN_FAULT_FATAL" (2144942)

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Instant clone creation fails with the error "Fault type is UNKNOWN_FAULT_FATAL - Either the resource pool: <resource group name> is empty or all its hosts are marked for maintenance." This is because the hosts are in or are marked for maintenance mode.


Bring the hosts out of maintenance. Make sure that InstantClone.Maintenance is not set to 1 or 2 for any of the hosts. If it is, from vSphere Client, go to the host's Summary tab, edit Annotations, and clear the value for InstantClone.Maintenance.

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