vanzin commented on a change in pull request #23698: [SPARK-26766][CORE] Remove 
the list of filesystems from 
HadoopDelegationTokenProvider.obtainDelegationTokens
URL: https://github.com/apache/spark/pull/23698#discussion_r252444980
 
 

 ##########
 File path: 
resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/config.scala
 ##########
 @@ -244,20 +239,6 @@ package object config {
     .booleanConf
     .createWithDefault(false)
 
-  /* Security configuration. */
-
-  private[spark] val NAMENODES_TO_ACCESS = 
ConfigBuilder("spark.yarn.access.namenodes")
-    .doc("Extra NameNode URLs for which to request delegation tokens. The 
NameNode that hosts " +
-      "fs.defaultFS does not need to be listed here.")
-    .stringConf
-    .toSequence
-    .createWithDefault(Nil)
-
-  private[spark] val FILESYSTEMS_TO_ACCESS = 
ConfigBuilder("spark.yarn.access.hadoopFileSystems")
 
 Review comment:
   You need to add this to the deprecated configs in the `SparkConf` object, 
and also remove the old mapping for this, so that existing configs map to the 
new config name.

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