[SPARK-6558] Utils.getCurrentUserName returns the full principal name instead of login name

Utils.getCurrentUserName returns UserGroupInformation.getCurrentUser().getUserName() when SPARK_USER isn't set. It should return UserGroupInformation.getCurrentUser().getShortUserName()
getUserName() returns the users full principal name (ie user1CORP.COM). getShortUserName() returns just the users login name (user1).

This just happens to work on YARN because the Client code sets:
env("SPARK_USER") = UserGroupInformation.getCurrentUser().getShortUserName()

Author: Thomas Graves <tgraves@apache.org>

Closes #5229 from tgravescs/SPARK-6558 and squashes the following commits:

24830bf [Thomas Graves] Utils.getCurrentUserName returns the full principal name instead of login name

1 files changed, 1 insertions, 1 deletions

diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index 949bc556eb..c136584b19 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -1998,7 +1998,7 @@ private[spark] object Utils extends Logging {
    */
   def getCurrentUserName(): String = {
     Option(System.getenv("SPARK_USER"))
-      .getOrElse(UserGroupInformation.getCurrentUser().getUserName())
+      .getOrElse(UserGroupInformation.getCurrentUser().getShortUserName())
   }
 
 }