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MAPREDUCE-3092. Removed a special comparator for JobIDs in JobHistory as JobIDs are already comparable. Contributed by Devaraj K. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1176453 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Vinod Kumar Vavilapalli 2011-09-27 16:11:54 +00:00
parent 17da0bdb27
commit 6507a0bc35
2 changed files with 7 additions and 24 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -313,6 +313,9 @@ Release 0.23.0 - Unreleased
MAPREDUCE-3055. Simplified ApplicationAttemptId passing to
ApplicationMaster via environment variable. (vinodkv)
MAPREDUCE-3092. Removed a special comparator for JobIDs in JobHistory as
JobIDs are already comparable. (Devaraj K via vinodkv)
OPTIMIZATIONS
MAPREDUCE-2026. Make JobTracker.getJobCounters() and

28
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/JobHistory.java
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@ -22,7 +22,6 @@ import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
@ -84,25 +83,6 @@ public class JobHistory extends AbstractService implements HistoryContext {
private static final Log SUMMARY_LOG = LogFactory.getLog(JobSummary.class);
/*
* TODO Get rid of this once JobId has it's own comparator
*/
private static final Comparator<JobId> JOB_ID_COMPARATOR =
new Comparator<JobId>() {
@Override
public int compare(JobId o1, JobId o2) {
if (o1.getAppId().getClusterTimestamp() >
o2.getAppId().getClusterTimestamp()) {
return 1;
} else if (o1.getAppId().getClusterTimestamp() <
o2.getAppId().getClusterTimestamp()) {
return -1;
} else {
return o1.getId() - o2.getId();
}
}
};
private static String DONE_BEFORE_SERIAL_TAIL =
JobHistoryUtils.doneSubdirsBeforeSerialTail();
@ -118,19 +98,19 @@ public class JobHistory extends AbstractService implements HistoryContext {
//Maintains minimal details for recent jobs (parsed from history file name).
//Sorted on Job Completion Time.
private final SortedMap<JobId, MetaInfo> jobListCache =
new ConcurrentSkipListMap<JobId, MetaInfo>(JOB_ID_COMPARATOR);
new ConcurrentSkipListMap<JobId, MetaInfo>();
// Re-use exisiting MetaInfo objects if they exist for the specific JobId. (synchronization on MetaInfo)
// Check for existance of the object when using iterators.
private final SortedMap<JobId, MetaInfo> intermediateListCache =
new ConcurrentSkipListMap<JobId, JobHistory.MetaInfo>(JOB_ID_COMPARATOR);
new ConcurrentSkipListMap<JobId, JobHistory.MetaInfo>();
//Maintains a list of known done subdirectories. Not currently used.
private final Set<Path> existingDoneSubdirs = new HashSet<Path>();
private final SortedMap<JobId, Job> loadedJobCache =
new ConcurrentSkipListMap<JobId, Job>(JOB_ID_COMPARATOR);
new ConcurrentSkipListMap<JobId, Job>();
/**
* Maintains a mapping between intermediate user directories and the last
@ -673,7 +653,7 @@ public class JobHistory extends AbstractService implements HistoryContext {
private Map<JobId, Job> getAllJobsInternal() {
//TODO This should ideally be using getAllJobsMetaInfo
// or get rid of that method once Job has APIs for user, finishTime etc.
SortedMap<JobId, Job> result = new TreeMap<JobId, Job>(JOB_ID_COMPARATOR);
SortedMap<JobId, Job> result = new TreeMap<JobId, Job>();
try {
scanIntermediateDirectory();
} catch (IOException e) {