Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/9232#discussion_r42866102
--- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala ---
@@ -1337,55 +1337,8 @@ object Client extends Logging {
conf: Configuration,
credentials: Credentials) {
if (shouldGetTokens(sparkConf, "hive") &&
UserGroupInformation.isSecurityEnabled) {
--- End diff --
yeah, probably does. In fact, getting a delegation token there is
potentially worse than useless, as that DT will eventually expire. Using the
keytab direct will, provided the user keeps logging on, stay valid.
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