The purpose of this article is to resolve Error - operation time out while configuring HA.
Symptoms:
Operation timed out
Cannot find vSphere HA master agent
vSphere HA agent on <<Host's Name>> in cluster <<Cluster's Name>> in <<Datacenter's Name>> is disabled
The vSphere HA availability state of the host <<Host's Name>> in cluster <<Cluster's Name>> in <<Datacenter's Name>> has changed to Uninitialized
The vSphere HA availability state of the host <<Host's Name>> in cluster <<Cluster's Name>> in <<Datacenter's Name>> has changed to Initialization Error
vSphere HA agent for host <<Host's Name>> has an error in <<Cluster's Name>> in <<Datacenter's Name>>: vSphere HA agent cannot be correctly installed or configured
VMware vCenter Server Appliance 6.5.x
VMware vCenter Server 6.5.x
VMware vCenter Server 6.0.x
VMware vCenter Server 6.7.x
VMware vCenter Server Appliance 6.0.x
VMware vCenter Server 7.0.x
VMware vCenter Server Appliance 6.7.x
VMware vCenter Server 8.0.x
Note: If jumbo frames are configured then make sure you are able to ping the vmkernel with a minimum of 9000 packet size. For more information see, Testing VMkernel network connectivity with the vmkping command.