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https://issues.apache.org/jira/browse/MAPREDUCE-2410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13031952#comment-13031952
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Hadoop QA commented on MAPREDUCE-2410:
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+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12478845/MAPREDUCE-2410.r3.diff
against trunk revision 1101741.
+1 @author. The patch does not contain any @author tags.
+0 tests included. The patch appears to be a documentation patch that
doesn't require 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 findbugs. The patch does not introduce any 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 core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
+1 system test framework. The patch passed system test framework compile.
Test results:
https://builds.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/232//testReport/
Findbugs warnings:
https://builds.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/232//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://builds.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/232//console
This message is automatically generated.
> document multiple keys per reducer oddity in hadoop streaming FAQ
> -----------------------------------------------------------------
>
> Key: MAPREDUCE-2410
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2410
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/streaming, documentation
> Affects Versions: 0.20.2
> Reporter: Dieter Plaetinck
> Assignee: Harsh J Chouraria
> Priority: Minor
> Labels: newbie
> Fix For: 0.23.0
>
> Attachments: MAPREDUCE-2410.r1.diff, MAPREDUCE-2410.r2.diff,
> MAPREDUCE-2410.r3.diff
>
> Original Estimate: 40m
> Remaining Estimate: 40m
>
> Hi,
> for a newcomer to hadoop streaming, it comes as a surprise that the reducer
> receives arbitrary keys, unlike the "real" hadoop where a reducer works on a
> single key.
> An explanation for this is @
> http://mail-archives.apache.org/mod_mbox/hadoop-common-user/201103.mbox/browser
> I suggest to add this to the FAQ of hadoop streaming
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