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From Harsh J <ha...@cloudera.com>
Subject Re: Doubt regarding debugging Hadoop Classes
Date Tue, 03 Jul 2012 02:14:34 GMT
As far as I can tell, the Fetcher class executes from within a Task
JVM. So check your reduce's userlogs output instead of the
service's/daemon's logs.

Additionally, depending on what version of Hadoop you're using for
your project, try this: http://search-hadoop.com/m/SKajPZOkJa1

On Tue, Jul 3, 2012 at 4:29 AM, Pavan Kulkarni <pavan.baburao@gmail.com> wrote:
> Hi,
>
>  I am new to Hadoop community and am working on a project which involves
> tweaking few Hadoop classes.
> To enable debugging for a certain class (say Fetcher.java) I inserted a line
> *log4j.logger.org.apache.hadoop.mapreduce.task.reduce.Fetcher=DEBUG*
> *
> *
> Then I restarted the daemon's and grep'd in the log directory for the Debug
> message present in the Fetcher.java class.
> I couldn't find any !!
>
> Am I missing anything here? Any help is highly appreciated .Thanks
>
> --
>
> --With Regards
> Pavan Kulkarni



-- 
Harsh J

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