Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/2286#discussion_r17174246
--- Diff: core/src/main/scala/org/apache/spark/SecurityManager.scala ---
@@ -162,7 +162,7 @@ private[spark] class SecurityManager(sparkConf:
SparkConf) extends Logging {
// always add the current user and SPARK_USER to the viewAcls
private val defaultAclUsers =
Set[String](System.getProperty("user.name", ""),
- Option(System.getenv("SPARK_USER")).getOrElse(""))
+ Option(System.getenv("SPARK_USER")).getOrElse("")).filter(_ != "")
--- End diff --
can you change this to be !_.isEmpty
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