Siddharth Seth created YARN-673:
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Summary: 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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