Github user ArtRand commented on a diff in the pull request:
https://github.com/apache/spark/pull/19272#discussion_r148982457
--- Diff:
resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosCoarseGrainedSchedulerBackend.scala
---
@@ -58,8 +62,9 @@ private[spark] class MesosCoarseGrainedSchedulerBackend(
extends CoarseGrainedSchedulerBackend(scheduler, sc.env.rpcEnv)
with org.apache.mesos.Scheduler with MesosSchedulerUtils {
- override def hadoopDelegationTokenManager:
Option[HadoopDelegationTokenManager] =
- Some(new HadoopDelegationTokenManager(sc.conf, sc.hadoopConfiguration))
+ private lazy val hadoopCredentialRenewer: MesosCredentialRenewer =
--- End diff --
For Mesos the credential renewer contains the tokens, the renewal time, and
all logic to renew the tokens. Should never be evaluated (and tokens never
initialized) if `UserGroupInformation.isSecurityEnabled` evaluates to `false`
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