Github user harishreedharan commented on a diff in the pull request:
https://github.com/apache/spark/pull/4688#discussion_r25920307
--- Diff: core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala
---
@@ -122,6 +126,14 @@ class SparkHadoopUtil extends Logging {
}
/**
+ * Schedule a login from the keytab and principal set using the
--principal and --keytab
+ * arguments to spark-submit. This login happens only when the
credentials of the current user
+ * are about to expire. This method reads SPARK_PRINCIPAL and
SPARK_KEYTAB from the environment
+ * to do the login. This method is a no-op in non-YARN mode.
+ */
+ private[spark] def scheduleLoginFromKeytab(): Unit = {}
--- End diff --
The reason is that this is used from CoarseGrainedSchedulerBackend. Either
we have this here or have a match-case in that class. I'd rather have this
method as the code there becomes cleaner.
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