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https://issues.apache.org/jira/browse/MAPREDUCE-796?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amar Kamat reopened MAPREDUCE-796:
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> 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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