Github user SaintBacchus commented on a diff in the pull request:
https://github.com/apache/spark/pull/8867#discussion_r40750990
--- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala ---
@@ -544,6 +545,7 @@ private[spark] class Client(
logInfo(s"Credentials file set to: $credentialsFile")
val renewalInterval = getTokenRenewalInterval(stagingDirPath)
sparkConf.set("spark.yarn.token.renewal.interval",
renewalInterval.toString)
+ SparkHadoopUtil.get.startExecutorDelegationTokenRenewer(sparkConf)
--- End diff --
This code had change the configuration `spark.yarn.credentials.file`, and
this configuration would be used in `DelegationTokenUpdate`, so it had to put
the `start` after this.
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