Cluster-wide load balancing will occur only when there are no regions in transition and according to a fixed period of a time using {@link #balanceCluster(Map)}.
Inline region placement with {@link #immediateAssignment} can be used whenthe Master needs to handle closed regions that it currently does not have a destination set for. This can happen during master failover.
On cluster startup, bulk assignment can be used to determine locations for all Regions in a cluster.
This classes produces plans for the {@link AssignmentManager} to execute.
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