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https://issues.apache.org/jira/browse/YARN-7677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16349168#comment-16349168
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Jim Brennan commented on YARN-7677:
-----------------------------------
Agreed - given that we are just processing the hash map in order, it seems like
we've just been getting lucky that the variables on which the classpath depends
are coming before it in the launch_container.sh script.
> 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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