A.The default VM Monitoring Sensitivity is set too high.
B.There are not enough datastore heartbeat datastores configured by default.
C.The default slot size in the cluster is set too high.
D.There are virtual machines with large CPU reservations.
E.A host is in maintenance mode for a replacement of a failed Hard Drive.
This error message happens when the default slot size in the cluster is too high or the virtual
machines with large CPU reservations are used. It also happens when the host is in maintenance
mode for the replace of a failed hard drive.