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Re: HBase MapReduce problem
Thanks Ted, I actually tried to modify HBase, so i choose this developer
release.

So, you are thinking this is a version problem, should disappear if i
switched to 0.96?
2014/1/24 Ted Yu <[EMAIL PROTECTED]>

> Why do you use 0.95 which was a developer release ?
>
> See http://hbase.apache.org/book.html#d243e520
>
> Cheers
>
>
> On Fri, Jan 24, 2014 at 8:40 AM, daidong <[EMAIL PROTECTED]> wrote:
>
> > Dear all,
> >
> >   I have a simple HBase MapReduce application and try to run it on a
> > 12-node cluster using this command:
> >
> > HADOOP_CLASSPATH=`bin/hbase classpath` ~/hadoop-1.1.2/bin/hadoop jar
> > xxxx.jar org.test.WordCount
> >
> > HBase version is 0.95.0. But i got this error:
> >
> > java.lang.RuntimeException:
> > org.apache.hadoop.hbase.client.NoServerForRegionException: Unable to find
> > region for wordcount,,99999999999999 after 10 tries.
> >
> > after a long waiting from this output: 14/01/24 10:12:51 INFO
> > mapred.JobClient: map 0% reduce 0%
> >
> > It seems like RegionServer problem, however, i have tried all the ways
> > to make sure the HBase cluster is running well: i can access all
> > region servers through web ui, i can see the table 'wordcount' there,
> > i run 'hbase hbck' and it returns all 'ok'. I even try a simple HBase
> > program without MapReduce, it works well too.
> >
> > So, Could anybody tell me why this happens? how to fix it? Is it
> > relevant to my Hadoop configuration? Thanks!
> >
> > - Dong Dai
> >
>