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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3376) Old mapred API combiner uses NULL reporter
Date Wed, 21 Dec 2011 00:25:31 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13173666#comment-13173666
] 

Hudson commented on MAPREDUCE-3376:
-----------------------------------

Integrated in Hadoop-Mapreduce-0.23-Build #134 (See [https://builds.apache.org/job/Hadoop-Mapreduce-0.23-Build/134/])
    Merge -c 1221501 from trunk to branch-0.23 to fix MAPREDUCE-3376.

acmurthy : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1221502
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/Task.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/v2/TestMRAppWithCombiner.java

                
> 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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