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https://issues.apache.org/jira/browse/YARN-673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13656343#comment-13656343
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Siddharth Seth commented on YARN-673:
-------------------------------------
The documentation will be part of the source tree, so keeping it up to date
should not be any tougher. Grepping through *-default.xml is really only for
developers - and that should be possible on the documentation as well. Since
these files sit insider jars - I don't see how they serve as documentation iac.
> Remove yarn-default.xml
> -----------------------
>
> Key: YARN-673
> URL: https://issues.apache.org/jira/browse/YARN-673
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Siddharth Seth
>
> The default configuration files serve 2 purposes
> 1. Documenting available config parameters, and their default values.
> 2. Specifying default values for these parameters.
> An xml file hidden inside a jar is not necessarily the best way to document
> parameters. This could be moved into the documentation itself.
> Default values already exist in code for most parameters. There's no need to
> specify them in two places. We need to make sure defaults exist for all
> parameters before attempting this.
> Having default configuration files just bloats job conf files; over 450
> parameters, out of which <20 are likely job specific params. JobConf files
> end up being rather big, and the memory footprint of the conf object is large
> (>300KB last I checked).
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