Github user vanzin commented on a diff in the pull request: https://github.com/apache/spark/pull/19272#discussion_r150049113 --- Diff: core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala --- @@ -123,6 +123,9 @@ private[spark] class CoarseGrainedExecutorBackend( executor.stop() } }.start() + + case UpdateDelegationTokens(tokenBytes) => + SparkHadoopUtil.get.addDelegationTokens(tokenBytes, env.conf) --- End diff -- Can you add a `logInfo` saying the tokens are being updated? This has always been helpful when debugging issues with this feature on YARN.
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