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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4842) Streaming combiner should allow command, not just JavaClass
Date Tue, 17 Mar 2009 16:04:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12682706#action_12682706
] 

Hadoop QA commented on HADOOP-4842:
-----------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12402355/patch-4842-3.txt
  against trunk revision 755057.

    +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 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 Eclipse classpath. The patch retains Eclipse classpath integrity.

    +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.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/95/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/95/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/95/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/95/console

This message is automatically generated.

> Streaming combiner should allow command, not just JavaClass
> -----------------------------------------------------------
>
>                 Key: HADOOP-4842
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4842
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/streaming
>            Reporter: Marco Nicosia
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.21.0
>
>         Attachments: patch-4842-1.txt, patch-4842-2.txt, patch-4842-3.txt, patch-4842.txt
>
>
> Streaming jobs are way slower than Java jobs for many reasons, but certainly stopping
the shell-only programmer from using the combiner feature won't help. Right now, the streaming
usage says:
> {quote}
>   -mapper   <cmd|JavaClassName>      The streaming command to run
>   -combiner <JavaClassName> Combiner has to be a Java class
>   -reducer  <cmd|JavaClassName>      The streaming command to run
> {quote}

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