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https://issues.apache.org/jira/browse/YARN-2369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14682379#comment-14682379
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Dustin Cote commented on YARN-2369:
-----------------------------------
[~jlowe] thanks for all the input. I'll clean this latest patch up based on
these comments this week.
Happy to throw this in the MAPREDUCE project instead as well, since basically
all the changes are in the MR client. I don't think sub JIRAs would be
necessary since it's a pretty small change on the YARN side, but I leave that
to the project management experts. I don't see any organizational problem
keeping it all in one JIRA here.
> 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, YARN-2369-3.patch,
> YARN-2369-4.patch, YARN-2369-5.patch, YARN-2369-6.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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