Unable to confgure vSphere HA agent on ESX host "Configuration Error"

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I did my ESX host patching today and after that ESX host was rebooted and I exit that from Maintenance Mode but host was not able to join in HA. vSphere HA agent failed to install on ESX host. Below error occurs while host tried to install the vSphere HA agent.
I also tried to Reconfigure HA manually but getting below error on the host.

"The object 'vim.Datastore:datastore-4473' has already been deleted or has not been completely created"

First, I checked what all datastores are present on all ESX host from SAN end via below command.

Get-Cluster | Get-Datastore | Select Name, ID | Sort ID
From the above output, i didn't find the datastore-4473 exist on the ESX host.

The datastore-4473 was deleted directly from Hosts instead of unmounted and detached bcuz that LUN was not in use by any VM but use by HA for heartbeat purpose.

Now, it is clear that ESX host was searching for above data store during HA config on host and due to unavailability of data store, it fails straight away.

So, I detach that LUN from all ESX host and rescan storage device on all ESX host.

After that, i tried to Reconfigure the HA agent and this time it was completed successfully.





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