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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7226) Whitelisted variables do not support delayed variable expansion
Date Wed, 04 Oct 2017 14:23:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16191311#comment-16191311
] 

Jason Lowe commented on YARN-7226:
----------------------------------

The unit test failures appear to be unrelated, and they pass for me locally with the patch
applied.

> Whitelisted variables do not support delayed variable expansion
> ---------------------------------------------------------------
>
>                 Key: YARN-7226
>                 URL: https://issues.apache.org/jira/browse/YARN-7226
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.9.0, 2.8.1, 3.0.0-alpha4
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>         Attachments: YARN-7226.001.patch, YARN-7226.002.patch, YARN-7226.003.patch, YARN-7226.004.patch,
YARN-7226.005.patch, YARN-7226.006.patch, YARN-7226-branch-2.006.patch, YARN-7226-branch-2.007.patch,
YARN-7226-branch-2.8.006.patch
>
>
> The nodemanager supports a configurable list of environment variables, via yarn.nodemanager.env-whitelist,
that will be propagated to the container's environment unless those variables were specified
in the container launch context.  Unfortunately the handling of these whitelisted variables
prevents using delayed variable expansion.  For example, if a user shipped their own version
of hadoop with their job via the distributed cache and specified:
> {noformat}
> HADOOP_COMMON_HOME={{PWD}}/my-private-hadoop/
> {noformat}
>  as part of their job, the variable will be set as the *literal* string:
> {noformat}
> $PWD/my-private-hadoop/
> {noformat}
> rather than having $PWD expand to the container's current directory as it does for any
other, non-whitelisted variable being set to the same value.



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