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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3131) enabling BLOCK compression for map outputs breaks the reduce progress counters
Date Sat, 19 Jul 2008 00:32:31 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12614923#action_12614923
] 

Hadoop QA commented on HADOOP-3131:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12386001/HADOOP-3131-v2.patch
  against trunk revision 677872.

    +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 appears to introduce 1 new Findbugs 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.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2906/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2906/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2906/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2906/console

This message is automatically generated.

> enabling BLOCK compression for map outputs breaks the reduce progress counters
> ------------------------------------------------------------------------------
>
>                 Key: HADOOP-3131
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3131
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.17.0, 0.17.1, 0.17.2, 0.18.0, 0.19.0
>            Reporter: Colin Evans
>            Assignee: Matei Zaharia
>             Fix For: 0.19.0
>
>         Attachments: HADOOP-3131-v2.patch, merge-progress-trunk.patch, merge-progress.patch,
Picture 1.png
>
>
> Enabling map output compression and setting the compression type to BLOCK causes the
progress counters during the reduce to go crazy and report progress counts over 100%.
> This is problematic for speculative execution because it thinks the tasks are doing fine.

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