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