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Posted to mapreduce-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2016/04/27 14:59:13 UTC

[jira] [Commented] (MAPREDUCE-6687) Allow specifing java home via job configuration

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15260083#comment-15260083 ] 

Jason Lowe commented on MAPREDUCE-6687:
---------------------------------------

This can already be accomplished by setting the appropriate value for JAVA_HOME in mapreduce.map.env and mapreduce.reduce.env or mapred.child.env for the tasks and yarn.app.mapreduce.am.env for the ApplicationMaster.

> Allow specifing java home via job configuration
> -----------------------------------------------
>
>                 Key: MAPREDUCE-6687
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6687
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: applicationmaster
>            Reporter: He Tianyi
>            Priority: Minor
>
> Suggest allowing user to use a preferred JVM implementation (or version) by specifying java home via JobConf, to launch Map/Reduce tasks. 
> Especially useful for running A/B tests on real workload or benchmark between JVM implementations.



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