MAPREDUCE-5375. Use short name for renewing delegation tokens. Contributed by Venkat Ranganathan.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1499902 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -117,6 +117,9 @@ Release 1.2.1 - Unreleased
     MAPREDUCE-5364. Deadlock between RenewalTimerTask methods cancel() and run(). 
     (kkambatl via tucu)
 
+    MAPREDUCE-5375. Use short name for renewing delegation tokens. (Venkat
+    Ranganathan via acmurthy)
+
 Release 1.2.0 - 2013.05.05
 
   INCOMPATIBLE CHANGES

src/mapred/org/apache/hadoop/mapred/JobTracker.java

@@ -3874,7 +3874,7 @@ public class JobTracker implements MRConstants, InterTrackerProtocol,
       throw new IOException(
           "Delegation Token can be issued only with kerberos authentication");
     }
-    String user = UserGroupInformation.getCurrentUser().getUserName();
+    String user = UserGroupInformation.getCurrentUser().getShortUserName();
     return secretManager.renewToken(token, user);
   }