Package org.apache.hadoop.mapreduce.v2.hs
package org.apache.hadoop.mapreduce.v2.hs
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ClassDescriptionManages an in memory cache of parsed Job History files.Loads the basic job level data upfront.This module is responsible for talking to the JobClient (user facing).This class provides a way to interact with history files in a thread safe manor.Provides an API to query jobs that have finished.A MapReduce specific delegation token secret manager.Loads and manages the Job history cache.
JobHistoryServeris responsible for servicing all job history related requests from client.A job that has too many tasks associated with it, of which we do not parse its job history file, to prevent the Job History Server from hanging on parsing the file.