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From vanzin <>
Subject [GitHub] spark pull request #14065: [SPARK-14743][YARN] Add a configurable token mana...
Date Fri, 15 Jul 2016 22:10:55 GMT
Github user vanzin commented on a diff in the pull request:
    --- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/security/AMDelegationTokenRenewer.scala
    @@ -171,10 +175,13 @@ private[yarn] class AMDelegationTokenRenewer(
         keytabLoggedInUGI.doAs(new PrivilegedExceptionAction[Void] {
           // Get a copy of the credentials
           override def run(): Void = {
    -        val nns = YarnSparkHadoopUtil.get.getNameNodesToAccess(sparkConf) + dst
    -        hadoopUtil.obtainTokensForNamenodes(nns, freshHadoopConf, tempCreds)
    -        hadoopUtil.obtainTokenForHiveMetastore(sparkConf, freshHadoopConf, tempCreds)
    -        hadoopUtil.obtainTokenForHBase(sparkConf, freshHadoopConf, tempCreds)
    +        var nearestNextTime = Long.MaxValue
    +        credentialManager.obtainCredentials(freshHadoopConf, tempCreds).foreach { nextTime
    --- End diff --
    I also noticed that the logic will renew all tokens when the first token needs renewal.
It's probably fine since this should happen very rarely (once every few days). But that also
means that `obtainCredentialsFromService` is completely unused and can be deleted.

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