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From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3130) Shuffling takes too long to get the last map output.
Date Sat, 29 Mar 2008 00:38:24 GMT
Shuffling takes too long to get the last map output.
----------------------------------------------------

                 Key: HADOOP-3130
                 URL: https://issues.apache.org/jira/browse/HADOOP-3130
             Project: Hadoop Core
          Issue Type: Bug
            Reporter: Runping Qi



I noticed that towards the end of shufflling, the map output fetcher of the reducer backs
off too aggressively.
I attach a fraction of one reduce log of my job.
Noticed that the last map output was not fetched in 2 minutes.



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