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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (MAPREDUCE-796) Encountered "ClassCastException" on tasktracker while running wordcount with MultithreadedMapRunner
Date Fri, 07 Aug 2009 10:07:14 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-796?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amar Kamat reassigned MAPREDUCE-796:
------------------------------------

    Assignee: Amar Kamat

> Encountered "ClassCastException" on tasktracker while running wordcount with MultithreadedMapRunner
> ---------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-796
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-796
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: examples
>    Affects Versions: 0.20.1
>            Reporter: Suman Sehgal
>            Assignee: Amar Kamat
>
> ClassCastException for OutOfMemoryError is encountered on tasktracker while running wordcount
example with MultithreadedMapRunner. 
> Stack trace :
> =========
> java.lang.ClassCastException: java.lang.OutOfMemoryError cannot be cast to java.lang.RuntimeException
> 	at org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper.run(MultithreadedMapper.java:149)
> 	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:581)
> 	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:303)
> 	at org.apache.hadoop.mapred.Child.main(Child.java:170)

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