Shreya
There are multiple ways to debug map reduce programs. I found comfortable
using the jobtracker web UI. You can your job tracker web UI at
http://<server ip>:50030/jobtracker.jsp
Open it in a browser.
There you can find the running,failed and retired jobs. You can drill down on
any job to task tracker log levels from there.
Mostly I get the root cause of my job failures from there.
Hope it helps
Regards
Bejoy K S
-----Original Message-----
From: <shreya....@cognizant.com>
Date: Thu, 15 Sep 2011 09:39:23
To: <mapreduce-user@hadoop.apache.org>
Reply-To: mapreduce-user@hadoop.apache.org
Subject: Debugging Mapreduce programs
Hi
Can we use sysouts in java to debug MR programs.
Where would those sysouts be printed?
What would be the best way to debug a remote system where I have access
to the machine only through putty.
Regards
Shreya
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