Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/22598#discussion_r233870838
--- Diff: core/pom.xml ---
@@ -408,6 +408,19 @@
<scope>provided</scope>
</dependency>
+ <!--
+ The following kafka dependency used to obtain delegation token.
--- End diff --
+1 for it in one place, easier to maintain what is a security-critical
piece of code. -1 if ends up something like UGI which everyone is scared to go
near
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