Shane Kumpf commented on YARN-7677:

+1 (non-binding) from me as well. I ran my usual suite of tests with and 
without Docker and did not see any issues. Thanks for driving thisĀ 

> 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, 
> YARN-7677.003.patch, YARN-7677.004.patch, YARN-7677.005.patch, 
> YARN-7677.006.patch, YARN-7677.007.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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