Package org.apache.hadoop.mapreduce.v2.app.rm
@Private
package org.apache.hadoop.mapreduce.v2.app.rm
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ClassDescriptionRegisters/unregisters to RM and sends heartbeats to RM.Exception to denote fatal failure in allocating containers from RM.Allocates the container from the ResourceManager scheduler.Keeps the data structures to send container requests to RM.