Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/6676#issuecomment-110578274
BTW, using an env variable is mostly a trivial change. You just change the
non-YARN path in `SecurityManager::generateSecretKey`; basically, on the driver
side, generate a secret, and call
`sparkConf.setExecutorEnv("_SPARK_AUTH_SECRET")`. On the executor side, you
just do `sys.env.get("_SPARK_AUTH_SECRET")`.
Nothing else in the rest of the code should need to change.
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