dongjoon-hyun commented on code in PR #49949:
URL: https://github.com/apache/spark/pull/49949#discussion_r1955515974


##########
core/src/main/scala/org/apache/spark/util/Utils.scala:
##########
@@ -2448,7 +2449,7 @@ private[spark] object Utils
     } catch {
       // JEP 486: Permanently Disable the Security Manager
       case e: UnsupportedOperationException if 
e.getMessage().contains("getSubject") =>
-        "spark"
+        System.getProperty("user.name", "spark")

Review Comment:
   Maybe, do you consider this as alternative of `ACL`?



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