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https://issues.apache.org/jira/browse/YARN-10664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17295583#comment-17295583
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Eric Badger commented on YARN-10664:
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[~Jim_Brennan], with moving {{expandEnvironment}} to after {{sanitizeEnv}}, are
there any incompatible changes that will occur due to this change? I don't
think there will be, but would like for you to confirm with your own thoughts
> Allow parameter expansion in NM_ADMIN_USER_ENV
> ----------------------------------------------
>
> Key: YARN-10664
> URL: https://issues.apache.org/jira/browse/YARN-10664
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: yarn
> Affects Versions: 2.10.1, 3.4.0
> Reporter: Jim Brennan
> Assignee: Jim Brennan
> Priority: Major
> Attachments: YARN-10664.001.patch, YARN-10664.002.patch,
> YARN-10664.003.patch
>
>
> Currently, {{YarnConfiguration.NM_ADMIN_USER_ENV}} does not do parameter
> expansion. That is, you cannot specify an environment variable such as
> {code}{{JAVA_HOME}}{code} and have it be expanded to {{$JAVA_HOME}} inside
> the container.
> We have a need for this in specifying different java gc options for java
> processing running inside yarn containers based on which version of java is
> being used.
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