-Re: HBase MapReduce problem
daidong 2014-01-24, 16:53
Thanks Ted, I actually tried to modify HBase, so i choose this developer
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
> 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