Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/14065#discussion_r71046243
--- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala ---
@@ -390,8 +393,22 @@ private[spark] class Client(
// Upload Spark and the application JAR to the remote file system if
necessary,
// and add them as local resources to the application master.
val fs = destDir.getFileSystem(hadoopConf)
- val nns = YarnSparkHadoopUtil.get.getNameNodesToAccess(sparkConf) +
destDir
- YarnSparkHadoopUtil.get.obtainTokensForNamenodes(nns, hadoopConf,
credentials)
+
+ // Merge credentials obtained from registered providers
+ var nearestTimeOfNextRenewal = Long.MaxValue
+ credentialManager.obtainCredentials(hadoopConf, credentials).foreach {
t =>
--- End diff --
You don't really need to calculate `nearestTimeOfNextRenewal` if
`loginFromKeytab` is false, right?
Also, this all could be:
```
val nearestTimeOfNextRenewal =
credentialManager.obtainCredentials(hadoopConf, credentials).flatten.min
```
Just be careful to:
- validate that all returned times are after the current time
- watch out for when the result of `.flatten` is empty
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