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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-7069) Add ability to specify user environment variables individually
Date Tue, 10 Apr 2018 21:20:00 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-7069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16433021#comment-16433021
] 

Jason Lowe commented on MAPREDUCE-7069:
---------------------------------------

Thanks for updating the patch!  We're getting close.

The example command-line was updated to add the -D flags but they are still missing in the
paragraph preceding it in MapReduceTutorial.md.

Looking at the docs generated at http://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/mapred-default.xml
I'm wondering if it would be more useful to add the description for the .[var] form of the
properties to the base property instead of having separate, commented-out properties.  Users
probably won't ever notice the commented-out text in that file, especially since it's buried
in a .jar when deployed, but many would notice the docs generated for properties that aren't
commented out.  Thoughts?



> Add ability to specify user environment variables individually
> --------------------------------------------------------------
>
>                 Key: MAPREDUCE-7069
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7069
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Jim Brennan
>            Assignee: Jim Brennan
>            Priority: Major
>         Attachments: MAPREDUCE-7069.001.patch, MAPREDUCE-7069.002.patch, MAPREDUCE-7069.003.patch,
MAPREDUCE-7069.004.patch, MAPREDUCE-7069.005.patch, MAPREDUCE-7069.006.patch
>
>
> As reported in YARN-6830, it is currently not possible to specify an environment variable
that contains commas via {{mapreduce.map.env}}, mapreduce.reduce.env, or {{mapreduce.admin.user.env}}.
> To address this, [~aw] proposed in [YARN-6830] that we add the ability to specify environment
variables individually:
> {quote}e.g, mapreduce.map.env.[foo]=bar gets turned into foo=bar
> {quote}



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