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From "Dustin Cote (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2369) Environment variable handling assumes values should be appended
Date Tue, 05 May 2015 20:14:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-2369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14529194#comment-14529194
] 

Dustin Cote commented on YARN-2369:
-----------------------------------

[~vinodkv] thanks for the feedback!  I would expect (b) for general apps as a specific config
for MR jobs.  Should I put the config in MRConfig or MRJobConfig instead then?  I'll get the
specific comments you have fixed once I have the test case in too.  I'll put them all in the
next patch.  Thanks again!

> Environment variable handling assumes values should be appended
> ---------------------------------------------------------------
>
>                 Key: YARN-2369
>                 URL: https://issues.apache.org/jira/browse/YARN-2369
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.2.0
>            Reporter: Jason Lowe
>            Assignee: Dustin Cote
>         Attachments: YARN-2369-1.patch, YARN-2369-2.patch
>
>
> When processing environment variables for a container context the code assumes that the
value should be appended to any pre-existing value in the environment.  This may be desired
behavior for handling path-like environment variables such as PATH, LD_LIBRARY_PATH, CLASSPATH,
etc. but it is a non-intuitive and harmful way to handle any variable that does not have path-like
semantics.



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