Re: any tips on debugging?

[Alan Gates <ga...@yahoo-inc.com>]

If you want to see the reduce phase running on your cluster, looking at 
the UI provided by the hadoop jobtracker will do it.  This will allow 
you to see stdout, stderr, and logging output from the task.  If you're 
looking to actually attach to the reduce process with a debugger the 
easiest way to do that is run a cluster locally on your machine and 
attach the debugger to the reducer when it starts.

Alan.

Chuck Lan wrote:
> I want to see what is happening in the reduce phase on Hadoop as result of running the pig script.
>
> Thanks,
> Chuk
>
>
> -----Original Message-----
> From: Mridul Muralidharan [mailto:mridulm@yahoo-inc.com]
> Sent: Mon 9/29/2008 7:09 PM
> To: pig-user@incubator.apache.org
> Subject: Re: any tips on debugging?
>  
>
> Intention is to debug the pig script, the udf, or pig ?
>
> - Mridul
>
> Chuck Lan wrote:
>   
>> Hi,
>>
>>  
>>
>> If I want to see what's happening on reduce from running a pig script,
>> what's the best place to look at to start debugging?
>>
>>  
>>
>> Thanks,
>>
>> Chuck
>>
>>
>>     
>
>
>
>