Github user arunmahadevan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22598#discussion_r228321793
--- Diff:
core/src/main/scala/org/apache/spark/deploy/security/HadoopDelegationTokenManager.scala
---
@@ -66,7 +66,8 @@ private[spark] class HadoopDelegationTokenManager(
private def getDelegationTokenProviders: Map[String,
HadoopDelegationTokenProvider] = {
val providers = Seq(new HadoopFSDelegationTokenProvider(fileSystems))
++
safeCreateProvider(new HiveDelegationTokenProvider) ++
- safeCreateProvider(new HBaseDelegationTokenProvider)
+ safeCreateProvider(new HBaseDelegationTokenProvider) ++
+ safeCreateProvider(new KafkaDelegationTokenProvider)
--- End diff --
Update the class docs of which providers are loaded by default or better
set the default for `spark.security.credentials.kafka.enabled` to false.
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