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https://issues.apache.org/jira/browse/MAPREDUCE-3901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13218115#comment-13218115
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Hudson commented on MAPREDUCE-3901:
-----------------------------------
Integrated in Hadoop-Hdfs-trunk #969 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/969/])
MAPREDUCE-3901. Modified JobHistory records in YARN to lazily load job and
task reports so as to improve UI response times. Contributed by Siddarth Seth.
(Revision 1294417)
Result = UNSTABLE
vinodkv :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1294417
Files :
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/util/MRBuilderUtils.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/CompletedJob.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/CompletedTask.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/CompletedTaskAttempt.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/JobHistory.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/TestJobHistoryEntities.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/resources/job_1329348432655_0001-1329348443227-user-Sleep+job-1329348468601-10-1-SUCCEEDED-default.jhist
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/resources/job_1329348432655_0001_conf.xml
> lazy load JobHistory Task and TaskAttempt details
> -------------------------------------------------
>
> Key: MAPREDUCE-3901
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3901
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: jobhistoryserver, mrv2
> Affects Versions: 0.23.0
> Reporter: Siddharth Seth
> Assignee: Siddharth Seth
> Fix For: 0.23.2
>
> Attachments: MR3901.txt, MR3901_v2.txt, MR3901_v3.txt
>
>
> The job history UI and MRClientProtocol calls routed via JobHistory are very
> slow for large jobs. Some of this time is spent parsing the history file. A
> good chunk is spent pre-creating lots of objects which may never be used.
> Those can be create when required - bringing down the load times of job
> history pages and getJobReport etc calls to approximately the history file
> parse time.
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