"Unable to apply DRS resource settings on host" error in vCenter Server

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If the problem persists after restarting the management agents:

        1.        Put the host into maintenance mode.

Note: If DRS does not migrate the virtual machines to other hosts, migrate them manually.
        2.        Verify that EVC is enabled on the cluster.
        3.        If EVC is enabled, navigate to the Edit Settings of the cluster.
        4.        Click VMware EVC and confirm that it is currently enabled and has the proper setting for the cluster.
        5.        Ensure there are no virtual machines running on the host.
        6.        Remove the ESXi/ESX host by dragging it out of the cluster.
        7.        Re-add the ESXi/ESX host by dragging it into the cluster.
        8.        Exit from maintenance mode.

To work around this issue, run the rm /etc/vmware/hostd/pools.xml command on the ESXi/ESX host, then restart the management agents (hostd and vpxa) on the ESXi/ESX host.

If the issue persists, remove the host from the cluster and then re-add it to the cluster.

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