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Posted to mapreduce-issues@hadoop.apache.org by "Dustin Cote (JIRA)" <ji...@apache.org> on 2015/09/24 22:44:05 UTC

[jira] [Updated] (MAPREDUCE-6491) Environment variable handling assumes values should be appended

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dustin Cote updated MAPREDUCE-6491:
-----------------------------------
    Attachment: YARN-2369-8.patch

[~jlowe] thanks for the quick review.  I've fixed those nits now in patch 8.  Please let me know if there's anything else I can do on this one!

> Environment variable handling assumes values should be appended
> ---------------------------------------------------------------
>
>                 Key: MAPREDUCE-6491
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6491
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.2.0
>            Reporter: Jason Lowe
>            Assignee: Dustin Cote
>         Attachments: YARN-2369-1.patch, YARN-2369-2.patch, YARN-2369-3.patch, YARN-2369-4.patch, YARN-2369-5.patch, YARN-2369-6.patch, YARN-2369-7.patch, YARN-2369-8.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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