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Posted to mapreduce-issues@hadoop.apache.org by "Hadoop QA (Commented) (JIRA)" <ji...@apache.org> on 2012/02/23 05:37:48 UTC
[jira] [Commented] (MAPREDUCE-3901) lazy load JobHistory Task and
TaskAttempt details
[ https://issues.apache.org/jira/browse/MAPREDUCE-3901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214295#comment-13214295 ]
Hadoop QA commented on MAPREDUCE-3901:
--------------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12515687/MR3901.txt
against trunk revision .
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 6 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac compiler warnings.
+1 eclipse:eclipse. The patch built with eclipse:eclipse.
-1 findbugs. The patch appears to introduce 2 new Findbugs (version 1.3.9) warnings.
+1 release audit. The applied patch does not increase the total number of release audit warnings.
+1 core tests. The patch passed unit tests in .
+1 contrib tests. The patch passed contrib unit tests.
Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1912//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1912//artifact/trunk/hadoop-mapreduce-project/patchprocess/newPatchFindbugsWarningshadoop-mapreduce-client-hs.html
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1912//console
This message is automatically generated.
> 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
> Attachments: MR3901.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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