Hello,
  I am running the default map reduce  job (word count) in Hadoop. The job runs fine and I am able to delve into the statistics. However I get a warning as follows
"No job jar file set.  User classes may not be found. See JobConf(Class) or JobConf#setJar(String)."
  Also I set the following parameter in the core-site.xml
<property>
  <name>mapred.map.tasks</name>
  <value>2</value>
  <description>The default number of map tasks per job.  Typically set
  to a prime several times greater than number of available hosts.
  Ignored when mapred.job.tracker is "local".  
  </description>
</property>
However I still get only one map task and not two. Can someone suggest the solution to this problem.

Thanking you

Yours faithfully
Ranjan Banerjee

What does your input look like?

--
Met vriendelijke groet,
Niels Basjes
(Verstuurd vanaf mobiel )
Op 17 apr. 2012 02:57 schreef "Ranjan Banerjee" <[EMAIL PROTECTED]> het
volgende:

> Hello,
>   I am running the default map reduce  job (word count) in Hadoop. The job
> runs fine and I am able to delve into the statistics. However I get a
> warning as follows
> "No job jar file set.  User classes may not be found. See JobConf(Class)
> or JobConf#setJar(String)."
>   Also I set the following parameter in the core-site.xml
>
>
> <property>
>  <name>mapred.map.tasks</name>
>  <value>2</value>
>  <description>The default number of map tasks per job.  Typically set
>  to a prime several times greater than number of available hosts.
>  Ignored when mapred.job.tracker is "local".
>  </description>
> </property>
> However I still get only one map task and not two. Can someone suggest the
> solution to this problem.
>
> Thanking you
>
> Yours faithfully
> Ranjan Banerjee
>

Ensure you have a Job/JobConf.setJar (or setJarByClass) call in your
Driver, before launching the job.

On Tue, Apr 17, 2012 at 6:26 AM, Ranjan Banerjee <[EMAIL PROTECTED]> wrote:
> Hello,
>   I am running the default map reduce  job (word count) in Hadoop. The job runs fine and I am able to delve into the statistics. However I get a warning as follows
> "No job jar file set.  User classes may not be found. See JobConf(Class) or JobConf#setJar(String)."
>   Also I set the following parameter in the core-site.xml
>
>
> <property>
>  <name>mapred.map.tasks</name>
>  <value>2</value>
>  <description>The default number of map tasks per job.  Typically set
>  to a prime several times greater than number of available hosts.
>  Ignored when mapred.job.tracker is "local".
>  </description>
> </property>
> However I still get only one map task and not two. Can someone suggest the solution to this problem.
>
> Thanking you
>
> Yours faithfully
> Ranjan Banerjee

--
Harsh J

My input is a common text file taken off the web.

Regards
Ranjan

On 04/16/12, Niels Basjes   wrote:
> What does your input look like?
>
> --
> Met vriendelijke groet,
> Niels Basjes
> (Verstuurd vanaf mobiel )
> Op 17 apr. 2012 02:57 schreef "Ranjan Banerjee" <[EMAIL PROTECTED]> het
> volgende:
>
> > Hello,
> >   I am running the default map reduce  job (word count) in Hadoop. The job
> > runs fine and I am able to delve into the statistics. However I get a
> > warning as follows
> > "No job jar file set.  User classes may not be found. See JobConf(Class)
> > or JobConf#setJar(String)."
> >   Also I set the following parameter in the core-site.xml
> >
> >
> > <property>
> >  <name>mapred.map.tasks</name>
> >  <value>2</value>
> >  <description>The default number of map tasks per job.  Typically set
> >  to a prime several times greater than number of available hosts.
> >  Ignored when mapred.job.tracker is "local".
> >  </description>
> > </property>
> > However I still get only one map task and not two. Can someone suggest the
> > solution to this problem.
> >
> > Thanking you
> >
> > Yours faithfully
> > Ranjan Banerjee
> >