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From john smith <js1987.sm...@gmail.com>
Subject Re: Map phase hanging for wordcount example
Date Tue, 06 Sep 2011 09:30:48 GMT
Hi Harsh,

My jt log : http://pastebin.com/rXAEeDkC

I have some startup exceptions (which doesn't matter much I guess) but the
tail indicates that its locating the splits correctly and then it hangs !

Any idea?

Thanks


On Tue, Sep 6, 2011 at 1:30 PM, Harsh J <harsh@cloudera.com> wrote:

> 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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