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From "Robert Joseph Evans (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-3376) Old mapred API combiner uses NULL reporter
Date Tue, 08 Nov 2011 16:25:51 GMT
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


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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