Log4j Debugging Map Redece Jobs

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This topic contains 2 replies, has 2 voices, and was last updated by  chris palm 1 year, 4 months ago.

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  • #49950

    chris palm

    I have a Map/Reduce jar with log4j.properties embedded with my class files and the debug level set at root.
    When I run this on an older Hadoop distribution I get log output in the job files. When I run this with the HDP2.0 sandbox I don’t see any log
    output in the logs via the console or on the file system.

    How do I get the log levels to output in the sandbox for a map/reduce java job and where should I expect them to be?

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  • #49973

    chris palm

    Is there a way to use the Logger interface From Log4j that used to work in the earlier versions of Hadoop?



    Hi Chris
    You can use System.out.println in your code. This will output to the JobHistory logs under stdout. Hope this helps


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