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From Rohith Sharma K S <rohithsharm...@huawei.com>
Subject RE: How do I enable debug mode
Date Thu, 04 Dec 2014 15:03:57 GMT
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


I have below code in mapreduce program.
                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.


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