A vSphere Administrator sees the alarm:
vSphere HA virtual machine failed to failover
This occurred for a number of virtual machines on a particular ESXi host in a cluster with vSphere High Availability (HA) enabled. The virtual machines
guest operating systems never reported a power event.
What happened?
A. The virtual machines were vMotioned off of the ESXi host.
B. The ESXi host is still running but has disconnected from the network.
C. The ESXi host failed and vSphere HA successfully
failed over the virtual machines.
D. The previous virtual machine cloning operations failed to complete.
B.
If the host only disconnected but the HA option is to leave VMs powered on, HA will not failover the VM, but the VM will not have gone down.
https://kb.vmware.com/s/article/2034571
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