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Date: Tue, 8 Nov 2011 16:25:51 +0000 (UTC)
From: "Robert Joseph Evans (Created) (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
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Subject: [jira] [Created] (MAPREDUCE-3376) Old mapred API combiner uses NULL
 reporter
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Old mapred API combiner uses NULL reporter
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                 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


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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