Trouble in running HBase MR jobs

[bharath vissapragada <bh...@students.iiit.ac.in>]

Hi all ,

I am new to HBase MR programming . Though i have already used MR on hadoop
.. iam facing some difficulties in running my HBase MR job . Details are as
follows

I have written a file sample.java

I want to run only Map phase and no reduce phase and iam using
IdentityTableMp to take the input from a certain Hbase table

JobConf settings

JobConf c = new JobConf(getConf(), sample.class);
IdentityTableMap.initJob(args[0], args[1], this.getClass(), c);
c.setOutputFormat(NullOutputFormat.class);       ----------------------->
iam not sure abt this statement
c.setNumReduceTasks(0);

Initially i didnt set any OutputPath .. but when i tried to run the code ...
it raised some error saying that an OuputhPath must be set      ..so i set
it as above

Map fnction

public void mapp(ImmutableBytesWritable row, RowResult value,
OutputCollector<Text, Text> output, Reporter reporter) throws IOException {
        System.out.println(row);
}

In the map function here  im just trying to print the value of row to see
whether its working or not
when i compile the code and execute "bin/hbase sample" ... i dont get any
error and INFO abt the MR job is displayed normally. BUT the print statement
is not executed .. that is row name s not printed ..
this means that there is some problem in the conf because there is a simple
print statement in Map .. can anyone point it please ... KINDA URGENT

Re: Trouble in running HBase MR jobs

[bharath vissapragada <bh...@gmail.com>]

Even if i keep simple print statements it is not working .. is there some
problem with the conf object or .. some problem with my hbase config ...

how i compiled my java file is

javac -classpath <hbase-jar path>:<hadoop jar path> <file-name>.java
bin/hbase <file-name>

is this the correct method to runt the HBase MR jobs?

On Thu, Jul 23, 2009 at 9:44 AM, stack <st...@duboce.net> wrote:

> No. Should work.
> St.Ack
>
> On Wed, Jul 22, 2009 at 8:35 PM, bharath vissapragada <
> bharathvissapragada1990@gmail.com> wrote:
>
> > Actually im running these MR programs in local stand alone mode ... Is
> this
> > any issue?
> >
> > On Wed, Jul 22, 2009 at 11:49 PM, Erik Holstad <erikholstad@gmail.com
> > >wrote:
> >
> > > Hi Bharath!
> > > Did you have a look at http://"your_machine":50030/jobtracker.jsp
> > > Should give you the logs, or output that you are looking for.
> > >
> > > Regards Erik
> > >
> >
>

Re: Trouble in running HBase MR jobs

[stack <st...@duboce.net>]

No. Should work.
St.Ack

On Wed, Jul 22, 2009 at 8:35 PM, bharath vissapragada <
bharathvissapragada1990@gmail.com> wrote:

> Actually im running these MR programs in local stand alone mode ... Is this
> any issue?
>
> On Wed, Jul 22, 2009 at 11:49 PM, Erik Holstad <erikholstad@gmail.com
> >wrote:
>
> > Hi Bharath!
> > Did you have a look at http://"your_machine":50030/jobtracker.jsp
> > Should give you the logs, or output that you are looking for.
> >
> > Regards Erik
> >
>

Re: Trouble in running HBase MR jobs

[bharath vissapragada <bh...@gmail.com>]

Actually im running these MR programs in local stand alone mode ... Is this
any issue?

On Wed, Jul 22, 2009 at 11:49 PM, Erik Holstad <er...@gmail.com>wrote:

> Hi Bharath!
> Did you have a look at http://"your_machine":50030/jobtracker.jsp
> Should give you the logs, or output that you are looking for.
>
> Regards Erik
>

Re: Trouble in running HBase MR jobs

[Erik Holstad <er...@gmail.com>]

Hi Bharath!
Did you have a look at http://"your_machine":50030/jobtracker.jsp
Should give you the logs, or output that you are looking for.

Regards Erik