Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/14065#discussion_r72749483
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/security/CredentialUpdater.scala
---
@@ -41,16 +43,18 @@ private[spark] class ExecutorDelegationTokenUpdater(
SparkHadoopUtil.get.getConfBypassingFSCache(
hadoopConf, new Path(credentialsFile).toUri.getScheme)
- private val delegationTokenRenewer =
+ private val credentialUpdater =
Executors.newSingleThreadScheduledExecutor(
- ThreadUtils.namedThreadFactory("Delegation Token Refresh Thread"))
+ ThreadUtils.namedThreadFactory("Credential Refresh Thread"))
- // On the executor, this thread wakes up and picks up new tokens from
HDFS, if any.
- private val executorUpdaterRunnable =
+ // This thread wakes up and picks up new credentials from HDFS, if any.
+ private val credentialUpdaterRunnable =
new Runnable {
override def run(): Unit =
Utils.logUncaughtExceptions(updateCredentialsIfRequired())
}
+ @volatile private var timeOfNextUpdate =
sparkConf.get(CREDENTIALS_UPDATE_TIME)
--- End diff --
This method `updateCredentialsIfRequired ` will periodically call itself,
so it is easy to code to put it as a field.
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