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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3376) Old mapred API combiner uses NULL reporter
Date Wed, 30 Nov 2011 09:57:40 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13159948#comment-13159948
] 

Hadoop QA commented on MAPREDUCE-3376:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12505595/MAPREDUCE-3376.patch
  against trunk revision .

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

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    -1 javac.  The applied patch generated 1836 javac compiler warnings (more than the trunk's
current 1826 warnings).

    -1 findbugs.  The patch appears to introduce 12 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 failed these unit tests:
                  org.apache.hadoop.mapreduce.v2.TestMRJobsWithHistoryService
                  org.apache.hadoop.mapred.TestMiniMRClientCluster
                  org.apache.hadoop.mapreduce.v2.TestUberAM
                  org.apache.hadoop.mapred.TestClientRedirect

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1366//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1366//artifact/trunk/hadoop-mapreduce-project/patchprocess/newPatchFindbugsWarningshadoop-mapreduce-examples.html
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1366//console

This message is automatically generated.
                
> Old mapred API combiner uses NULL reporter
> ------------------------------------------
>
>                 Key: MAPREDUCE-3376
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3376
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv1, mrv2
>    Affects Versions: 0.20.205.0, 0.23.0, 0.24.0
>            Reporter: Robert Joseph Evans
>            Assignee: Subroto Sanyal
>             Fix For: 0.23.1
>
>         Attachments: MAPREDUCE-3376.patch
>
>
> The OldCombinerRunner class inside Task.java uses a NULL Reporter.  If the combiner code
runs for an extended period of time, even with reporting progress as it should, the map task
can timeout and be killed.  It appears that the NewCombinerRunner class uses a valid reporter
and as such is not impacted by this bug.

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