Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/20167#discussion_r161074854
--- Diff:
resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala
---
@@ -80,10 +80,27 @@ trait MesosSchedulerUtils extends Logging {
}
fwInfoBuilder.setHostname(Option(conf.getenv("SPARK_PUBLIC_DNS")).getOrElse(
conf.get(DRIVER_HOST_ADDRESS)))
+ conf.getOption("spark.mesos.principal.file")
--- End diff --
Why is it necessary to read the principal from a file? It's not a really
sensitive parameter, and can be provided with `--conf` with no issues.
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