HDFS-6829. DFSAdmin refreshSuperUserGroupsConfiguration failed in security cluster. (Contributed by zhaoyunjiong)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1619882 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -630,6 +630,9 @@ Release 2.6.0 - UNRELEASED
 
     HDFS-6890. NFS readdirplus doesn't return dotdot attributes (brandonli)
 
+    HDFS-6829. DFSAdmin refreshSuperUserGroupsConfiguration failed in
+    security cluster (zhaoyunjiong via Arpit Agarwal)
+
 Release 2.5.0 - 2014-08-11
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java

@@ -356,7 +356,7 @@ public class DFSAdmin extends FsShell {
    * Construct a DFSAdmin object.
    */
   public DFSAdmin() {
-    this(null);
+    this(new HdfsConfiguration());
   }
 
   /**