Wangda Tan commented on YARN-5145:

Thanks [~kaisasak] and [~sunilg] looking into the issue.

I'm not sure about how to solve this issue:

To me, It is fine to put configs.env in any place for a development 
environment. For example under source tree.

But it is still very important to make it be able to config envs from 
HADOOP_CONF_DIR. And I think it's better to not assume source code dir: 
{{$HADOOP_PREFIX/share/hadoop/yarn/webapps/}} will be writable in a real 
environment. What I can mostly see for most deployment is, yarn user doesn't 
have permission to write $HADOOP_PREFIX.

Can we pass some parameter/env to the HTTP server which hosts YARN UI code in 

[~Sreenath], could you also share some thoughts?

> [YARN-3368] Move new YARN UI configuration to HADOOP_CONF_DIR
> -------------------------------------------------------------
>                 Key: YARN-5145
>                 URL: https://issues.apache.org/jira/browse/YARN-5145
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Wangda Tan
>            Assignee: Kai Sasaki
>         Attachments: YARN-5145-YARN-3368.01.patch
> Existing YARN UI configuration is under Hadoop package's directory: 
> $HADOOP_PREFIX/share/hadoop/yarn/webapps/, we should move it to 
> $HADOOP_CONF_DIR like other configurations.

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