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https://issues.apache.org/jira/browse/YARN-2369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dustin Cote updated YARN-2369:
------------------------------
Attachment: YARN-2369-2.patch
New patch has a configurable whitelist for variables with append enabled as
yarn.application.variables.with.append. The existing unit tests are passing
from TestMRApps. Next up, a test to try to append to a variable not on the
default white list and verify it gets replaced instead of appended to.
[~jlowe], any thoughts on things that are missing from this latest patch or
problems with the design?
> 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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