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From Rohit Kelkar <rohitkel...@gmail.com>
Subject Re: mapper not running on the same region server
Date Wed, 07 Dec 2011 05:21:10 GMT
My hadoop cluster has 3 nodes in it and hbase too runs on the same 3
nodes. But the table that I am speaking of has only one region and
http://master:50030/jobtracker.jsp shows only one mapper running.
- Rohit Kelkar

On Tue, Dec 6, 2011 at 8:38 PM, Stack <stack@duboce.net> wrote:
> On Tue, Dec 6, 2011 at 12:50 AM, Rohit Kelkar <rohitkelkar@gmail.com> wrote:
>> I am running a mapreduce job on a hbase table. I hava a 3 node
>> cluster. Currently the table has only a few rows. When I visit the
>> http://master:60010/master.jsp I can see that the table resides on
>> only one region server. When I run my mapreduce job on this table I
>> see the mapper running on a different node of my cluster. Shouldn't
>> the mapper be running on the same node that hosts the table?
>> I am using the TableMapReduceUtil.initTableMapperJob method to
>> initialize the mapreduce job.
> Yes.  Mappers should be running by the data.
> You have only one region in your table or more than one region and
> more than one mapper is running?
> St.Ack

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