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From "John George (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-3418) If map output is not found, shuffle runs in tight loop
Date Wed, 16 Nov 2011 21:29:51 GMT
If map output is not found, shuffle runs in tight loop
------------------------------------------------------

                 Key: MAPREDUCE-3418
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3418
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 0.23.0
            Reporter: John George


Sharad Agarwal bumped into this while simulating fetch failures. 

Removed the map output directory. Shuffle runs in tight loop throwing
:

2011-06-01 09:02:20,511 WARN org.apache.hadoop.mapreduce.task.reduce.Fetcher: Invalid map
id 
java.lang.IllegalArgumentException: TaskAttemptId string : TTP/1.1 500 Internal Server Error
Content-Type: text/plain; charset=UTF is not properly formed
    at org.apache.hadoop.mapreduce.TaskAttemptID.forName(TaskAttemptID.java:174)
    at org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyMapOutput(Fetcher.java:284)
    at org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java:251)
    at org.apache.hadoop.mapreduce.task.reduce.Fetcher.run(Fetcher.java:149)


Fetch failure is not triggered.

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