Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
HBase >> mail # user >> HBase MapReduce problem


Copy link to this message
-
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
> >
>

 
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB