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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5652) Reduce does not respect in-memory segment memory limit when number of on disk segments == io.sort.factor
Date Fri, 10 Apr 2009 19:14:14 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12697934#action_12697934
] 

Hadoop QA commented on HADOOP-5652:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12405143/5652-1.patch
  against trunk revision 763728.

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    +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 failed core unit tests.

    -1 contrib tests.  The patch failed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/180/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/180/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/180/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/180/console

This message is automatically generated.

> Reduce does not respect in-memory segment memory limit when number of on disk segments
== io.sort.factor
> --------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-5652
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5652
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.20.0
>            Reporter: Chris Douglas
>            Assignee: Chris Douglas
>            Priority: Minor
>             Fix For: 0.21.0
>
>         Attachments: 5652-0.patch, 5652-1.patch
>
>
> If the number of on-disk segments is exactly {{io.sort.factor}}, then map output segments
may be left in memory for the reduce contrary to the specification in {{mapred.job.reduce.input.buffer.percent}}.

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