Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/6676#issuecomment-110964315
> The line savings may not be that dramatic
Actually it would. Because all you need to do is change SparkConf to not
include `spark.authenticate.secret` in the executor's command line, change
SecurityManager to look for the secret in an env variable, and change
CommandUtils.buildLocalCommand to add the environment variable to the child.
That's a one line change in 3 different files.
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