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From Arkady Borkovsky <ark...@yahoo-inc.com>
Subject Re: [jira] Created: (HADOOP-645) Map-reduce task does not finish correctly when -reducer NONE is specified
Date Thu, 26 Oct 2006 21:05:13 GMT
In addition to the exception, the output files in create in DFS are  
completely wrong.
(with -reducer NONE, the outputs of map tasks are supposed to be copied  
to DFS output directory)

On Oct 26, 2006, at 1:35 PM, dhruba borthakur (JIRA) wrote:

> Map-reduce task does not finish correctly when -reducer NONE is  
> specified
> ----------------------------------------------------------------------- 
> --
>
>                  Key: HADOOP-645
>                  URL: http://issues.apache.org/jira/browse/HADOOP-645
>              Project: Hadoop
>           Issue Type: Bug
>           Components: contrib/streaming
>     Affects Versions: 0.7.2
>             Reporter: dhruba borthakur
>
>
> Map-reduce task does not finish correctly when -reducer NONE is  
> specified, The NONE option means that the reducer should not be  
> generating any output. Using this option causes an exception in the  
> task tracker:
>
> java.lang.IllegalArgumentException: URI is not hierarchical
> TaskRunner: at java.io.File.<init>(File.java:335)
> TaskRunner: at  
> org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java: 
> 583)
> TaskRunner: at  
> org.apache.hadoop.streaming.PipeMapper.close(PipeMapper.java:96)
> TaskRunner: at  
> org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:49)
> TaskRunner: at org.apache.hadoop.mapred.MapTask.run(MapTask.java:213)
> TaskRunner: at  
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1240)
> TaskRunner: sideEffectURI_ file:output length 11
>
>
> -- 
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