Github user vanzin commented on the issue: https://github.com/apache/spark/pull/22852 I looked at the existing docs after I wrote my comment and saw that paragraph. I think it's fine, maybe just in need of some update now that we have k8s, although I'm not sure yet how spark.authenticate behaves on k8s. It's probably ok as is. It could be clarified a little bit (e.g. mentioning explicitly the Master and Worker daemons) but not a big deal.
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