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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7677) Docker image cannot set HADOOP_CONF_DIR
Date Thu, 01 Feb 2018 21:28:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16349301#comment-16349301
] 

Jason Lowe commented on YARN-7677:
----------------------------------

YARN-5714 is very relevant here.  In the general case, we're not going to be able to order
the variables without doing a dependency analysis between them, and that's what YARN-5714
proposes to do.  I'll see what I can do to push that forward, since it looks like a more deterministic
ordering will be a prerequisite to doing any sort of change relative to how environment variables
are handled.  Otherwise we'll risk breaking some case where variable ordering happened to
work, and the user has little recourse to restore it to a working condition.


> Docker image cannot set HADOOP_CONF_DIR
> ---------------------------------------
>
>                 Key: YARN-7677
>                 URL: https://issues.apache.org/jira/browse/YARN-7677
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Eric Badger
>            Assignee: Jim Brennan
>            Priority: Major
>         Attachments: YARN-7677.001.patch, YARN-7677.002.patch
>
>
> Currently, {{HADOOP_CONF_DIR}} is being put into the task environment whether it's set
by the user or not. It completely bypasses the whitelist and so there is no way for a task
to not have {{HADOOP_CONF_DIR}} set. This causes problems in the Docker use case where Docker
containers will set up their own environment and have their own {{HADOOP_CONF_DIR}} preset
in the image itself. 



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