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https://issues.apache.org/jira/browse/MAPREDUCE-5059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13613361#comment-13613361
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Hadoop QA commented on MAPREDUCE-5059:
--------------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12575435/MAPREDUCE-5059-20130325.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 3 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3468//testReport/
Console output:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3468//console
This message is automatically generated.
> Job overview shows average merge time larger than for any reduce attempt
> ------------------------------------------------------------------------
>
> Key: MAPREDUCE-5059
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5059
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobhistoryserver, webapps
> Reporter: Jason Lowe
> Assignee: omkar vinit joshi
> Attachments: MAPREDUCE-5059-20130325.patch
>
>
> When looking at a job overview page on the history server, the Average Merge
> Time is often reported with a value that is far larger than the Elapsed Merge
> Time shown for any reduce task attempt. The job overview page calculates the
> merge time as the time delta between the sort finishing and the job launching
> while the attempts page calculates it as the time delta between the sort
> finishing and the shuffle finishing.
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