Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16432#discussion_r95103643
--- 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 --
Why previously we use math.max and now changed to minimum value?
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