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From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1173) Mapper fail rate increases significantly as the number of reduces increase
Date Wed, 28 Mar 2007 16:51:25 GMT
Mapper fail rate increases significantly as the number of reduces increase
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                 Key: HADOOP-1173
                 URL: https://issues.apache.org/jira/browse/HADOOP-1173
             Project: Hadoop
          Issue Type: Bug
            Reporter: Runping Qi



I ran a large sort job, with about 8400 mappers.
In the first run, I used 301 reducers. About 600 mapper tasks failed.
In another run, I used 607 reducers. More than 3800 mapper tasks failed.



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