question Re: How to configure log4j in mapreduce program. in Archives of Support Questions (Read Only)

How to configure log4j in mapreduce program.

varmaprr — Thu, 24 Nov 2016 03:19:12 GMT

I have created a mapreduce program and used slf4j and log4j for logging in my MR JAVA program, but logs which i defined are not appearing in YARN application logs, where as logs are appearing in the CLI where i am running the job. Can you please tell if need to defined log4j.properties to override or define anywhere else?

Re: How to configure log4j in mapreduce program.

maheshmsh88 — Fri, 25 Nov 2016 15:58:56 GMT

Hi Varma,

Please go through below links. Hope it will be useful.

http://stackoverflow.com/questions/28119423/standard-practices-for-logging-in-mapreduce-jobs

http://grepalex.com/2012/11/12/hadoop-logging/

Thanks,

Mahesh

Re: How to configure log4j in mapreduce program.

sandyy006 — Sun, 27 Nov 2016 02:14:03 GMT

@Varma vetukuri

This post should help you https://community.hortonworks.com/questions/44564/map-reduce-logging-using-log4j-and-yarn-log-aggreg.html