Github user jerryshao commented on a diff in the pull request: https://github.com/apache/spark/pull/16432#discussion_r95104079 --- Diff: resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/security/HadoopFSCredentialProvider.scala --- @@ -56,14 +57,14 @@ private[security] class HDFSCredentialProvider extends ServiceCredentialProvider } // Get the time of next renewal. - tokenRenewalInterval.map { interval => - creds.getAllTokens.asScala - .filter(_.getKind == DelegationTokenIdentifier.HDFS_DELEGATION_KIND) + tokenRenewalInterval.flatMap { interval => + val nextRenewalDates = creds.getAllTokens.asScala + .filter(_.decodeIdentifier().isInstanceOf[AbstractDelegationTokenIdentifier]) .map { t => - val identifier = new DelegationTokenIdentifier() - identifier.readFields(new DataInputStream(new ByteArrayInputStream(t.getIdentifier))) + val identifier = t.decodeIdentifier().asInstanceOf[AbstractDelegationTokenIdentifier] identifier.getIssueDate + interval - }.foldLeft(0L)(math.max) + } + if (nextRenewalDates.isEmpty) None else Some(nextRenewalDates.min) --- End diff -- I think the logic was incorrect previously, we should get the minimum renewal date, that's why I changed here. But the code was probably OK if only we only have one default HDFS configured.
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