hadoop JobFinishedEvent 源码

  • 2022-10-20
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haddop JobFinishedEvent 代码


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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *     http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.hadoop.mapreduce.jobhistory;

import java.util.Set;

import org.apache.avro.util.Utf8;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.mapreduce.Counters;
import org.apache.hadoop.mapreduce.JobID;
import org.apache.hadoop.mapreduce.util.JobHistoryEventUtils;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEvent;
import org.apache.hadoop.yarn.api.records.timelineservice.TimelineMetric;

 * Event to record successful completion of job
public class JobFinishedEvent implements HistoryEvent {

  private JobFinished datum = null;

  private JobID jobId;
  private long finishTime;
  private int succeededMaps;
  private int succeededReduces;
  private int failedMaps;
  private int failedReduces;
  private int killedMaps;
  private int killedReduces;
  private Counters mapCounters;
  private Counters reduceCounters;
  private Counters totalCounters;

   * Create an event to record successful job completion
   * @param id Job ID
   * @param finishTime Finish time of the job
   * @param succeededMaps The number of succeeded maps
   * @param succeededReduces The number of succeeded reduces
   * @param failedMaps The number of failed maps
   * @param failedReduces The number of failed reduces
   * @param mapCounters Map Counters for the job
   * @param reduceCounters Reduce Counters for the job
   * @param totalCounters Total Counters for the job
  public JobFinishedEvent(JobID id, long finishTime,
      int succeededMaps, int succeededReduces,
      int failedMaps, int failedReduces,
      int killedMaps, int killedReduces,
      Counters mapCounters, Counters reduceCounters,
      Counters totalCounters) {
    this.jobId = id;
    this.finishTime = finishTime;
    this.succeededMaps = succeededMaps;
    this.succeededReduces = succeededReduces;
    this.failedMaps = failedMaps;
    this.failedReduces = failedReduces;
    this.killedMaps = killedMaps;
    this.killedReduces = killedReduces;
    this.mapCounters = mapCounters;
    this.reduceCounters = reduceCounters;
    this.totalCounters = totalCounters;

  JobFinishedEvent() {}

  public Object getDatum() {
    if (datum == null) {
      datum = new JobFinished();
      datum.setJobid(new Utf8(jobId.toString()));
      // using finishedMaps & finishedReduces in the Avro schema for backward
      // compatibility
      datum.setMapCounters(EventWriter.toAvro(mapCounters, "MAP_COUNTERS"));
    return datum;

  public void setDatum(Object oDatum) {
    this.datum = (JobFinished) oDatum;
    this.jobId = JobID.forName(datum.getJobid().toString());
    this.finishTime = datum.getFinishTime();
    this.succeededMaps = datum.getFinishedMaps();
    this.succeededReduces = datum.getFinishedReduces();
    this.failedMaps = datum.getFailedMaps();
    this.failedReduces = datum.getFailedReduces();
    this.killedMaps = datum.getKilledMaps();
    this.killedReduces = datum.getKilledReduces();
    this.mapCounters = EventReader.fromAvro(datum.getMapCounters());
    this.reduceCounters = EventReader.fromAvro(datum.getReduceCounters());
    this.totalCounters = EventReader.fromAvro(datum.getTotalCounters());

  public EventType getEventType() {
    return EventType.JOB_FINISHED;

  /** Get the Job ID */
  public JobID getJobid() { return jobId; }
  /** Get the job finish time */
  public long getFinishTime() { return finishTime; }
  /** Get the number of finished maps for the job */
  public int getSucceededMaps() { return succeededMaps; }
  /** Get the number of finished reducers for the job */
  public int getSucceededReduces() { return succeededReduces; }
  /** Get the number of failed maps for the job */
  public int getFailedMaps() { return failedMaps; }
  /** Get the number of failed reducers for the job */
  public int getFailedReduces() { return failedReduces; }
  /** Get the number of killed maps */
  public int getKilledMaps() { return killedMaps; }
  /** Get the number of killed reduces */
  public int getKilledReduces() { return killedReduces; }
  /** Get the counters for the job */
  public Counters getTotalCounters() {
    return totalCounters;
  /** Get the Map counters for the job */
  public Counters getMapCounters() {
    return mapCounters;
  /** Get the reduce counters for the job */
  public Counters getReduceCounters() {
    return reduceCounters;

  public TimelineEvent toTimelineEvent() {
    TimelineEvent tEvent = new TimelineEvent();
    tEvent.addInfo("FINISH_TIME", getFinishTime());
    tEvent.addInfo("NUM_MAPS", getSucceededMaps() + getFailedMaps()
        + getKilledMaps());
    tEvent.addInfo("NUM_REDUCES", getSucceededReduces() + getFailedReduces()
        + getKilledReduces());
    tEvent.addInfo("FAILED_MAPS", getFailedMaps());
    tEvent.addInfo("FAILED_REDUCES", getFailedReduces());
    tEvent.addInfo("SUCCESSFUL_MAPS", getSucceededMaps());
    tEvent.addInfo("SUCCESSFUL_REDUCES", getSucceededReduces());
    tEvent.addInfo("KILLED_MAPS", getKilledMaps());
    tEvent.addInfo("KILLED_REDUCES", getKilledReduces());
    // TODO replace SUCCEEDED with JobState.SUCCEEDED.toString()
    tEvent.addInfo("JOB_STATUS", "SUCCEEDED");
    return tEvent;

  public Set<TimelineMetric> getTimelineMetrics() {
    Set<TimelineMetric> jobMetrics = JobHistoryEventUtils.
        countersToTimelineMetric(getTotalCounters(), finishTime);
        countersToTimelineMetric(getMapCounters(), finishTime, "MAP:"));
        countersToTimelineMetric(getReduceCounters(), finishTime, "REDUCE:"));
    return jobMetrics;


hadoop 源码目录


hadoop AMStartedEvent 源码

hadoop AvroArrayUtils 源码

hadoop EventReader 源码

hadoop EventWriter 源码

hadoop HistoryEvent 源码

hadoop HistoryEventHandler 源码

hadoop HistoryViewer 源码

hadoop HistoryViewerPrinter 源码

hadoop HumanReadableHistoryViewerPrinter 源码

hadoop JSONHistoryViewerPrinter 源码

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