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From Gino Gu01 <Gino_G...@infosys.com>
Subject RE: How do I enable debug mode
Date Fri, 05 Dec 2014 02:31:57 GMT
Hi Rohith Sharma K S,

Thanks for your help.
After adding below four lines to hadoop-2.5.1/etc/hadoop/ log4j.properties,
“Mapper value =” still not got printed out.

yarn.app.mapreduce.am.log.level=DEBUG
mapreduce.map.log.level=DEBUG
mapreduce.reduce.log.level=DEBUG
log4j.logger.org.apache.hadoop = DEBUG

From: Rohith Sharma K S [mailto:rohithsharmaks@huawei.com]
Sent: Thursday, December 04, 2014 11:04 PM
To: user@hadoop.apache.org
Subject: RE: How do I enable debug mode

You can use below configuration at client for changing log level at MR

ApplicationMaster :        yarn.app.mapreduce.am.log.level=DEBUG
Mapper :             mapreduce.map.log.level=DEBUG
Reducer :             mapreduce.reduce.log.level=DEBUG

Thanks & Regards
Rohith Sharma K S

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From: Gino Gu01 [mailto:Gino_Gu01@infosys.com]
Sent: 04 December 2014 13:32
To: user@hadoop.apache.org
Subject: How do I enable debug mode

Hello,

I have below code in mapreduce program.
            if(logger.isDebugEnabled()){
                logger.info("Mapper value =" + value);
            }

How do I enable debug mode  to print “Mapper value =” in the logs.
I tried modifying hadoop-2.5.1/etc/hadoop/ log4j.properties, and it still doesn’t work.

Thanks

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