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From Harsh J <ha...@cloudera.com>
Subject Re: Map phase hanging for wordcount example
Date Tue, 06 Sep 2011 08:00:05 GMT
I'd check the tail of JobTracker logs after a submit is done to see if
an error/warn there is causing this. And then dig further on
why/what/how.

Hard to tell what your problem specifically is without logs :)

On Tue, Sep 6, 2011 at 1:18 PM, john smith <js1987.smith@gmail.com> wrote:
> Hi Folks,
>
> I am working on a 3 node cluster (1 NN + 2 DNs) . I loaded some test data
> with replication factor 3 (around 400MB data). However when I run wordcount
> example , it hangs at map 0%.
>
> bin/hadoop jar hadoop-examples-0.20.3-SNAPSHOT.jar wordcount /test_data
> /out2
> 11/09/06 13:07:28 INFO input.FileInputFormat: Total input paths to process :
> 2
> 11/09/06 13:07:28 INFO mapred.JobClient: Running job: job_201109061248_0002
> 11/09/06 13:07:29 INFO mapred.JobClient:  map 0% reduce 0%
>
> TTs and DNs are running fine on my slaves . I see them running when I run
> jps command.
>
>
> Can any one help me out on this? Any idea why this would happen? I am
> totally clueless as nothing shows up in logs too.!
>
> Thanks,
> jS
>



-- 
Harsh J

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