Github user jerryshao commented on the pull request:
https://github.com/apache/spark/pull/9523#issuecomment-154598834
@tgravescs , sorry for missing this parameter `--num-workers`. I suppose
user will not directly invoke yarn client through `spark-class`. Also from
`SparkSubmitArguments`, this `--num-workers` is not parsed.
So maybe we should deprecate this parameter, as @vanzin said current
there're so many ways we could set yarn related configurations, it is hard to
manage and easy to introduce bug, also confused a lot.
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