Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/10475#discussion_r53174906
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/ExecutorDelegationTokenUpdater.scala
---
@@ -76,7 +76,8 @@ private[spark] class ExecutorDelegationTokenUpdater(
SparkHadoopUtil.get.getTimeFromNowToRenewal(
sparkConf, 0.8,
UserGroupInformation.getCurrentUser.getCredentials)
if (timeFromNowToRenewal <= 0) {
- executorUpdaterRunnable.run()
+ // Wait a minutes to avoid cycle calling this method.
--- End diff --
Can you change this comment to be a bit more clear something like:
We just checked for new credentials but none were there, wait a minute and
retry. This handles the shutdown case where the staging directory may have
been removed.
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