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Posted to yarn-issues@hadoop.apache.org by "Dustin Cote (JIRA)" <ji...@apache.org> on 2015/04/12 16:19:12 UTC

[jira] [Commented] (YARN-2369) Environment variable handling assumes values should be appended

    [ https://issues.apache.org/jira/browse/YARN-2369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14491476#comment-14491476 ] 

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

It turns out my initial idea causes other problems with the application master, so I'm going up the call chain a bit to see what's going on.  Seems like it breaks org.apache.hadoop.mapreduce.v2.util.MRApps.java#addToEnvironment expectations at the moment, so maybe there's something else that needs to be done.

> 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
>
> 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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