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 <[email protected]> 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
