diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 4e713c83659..93873de4051 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -26,6 +26,8 @@ Release 2.0.3-alpha - Unreleased
     HDFS-3896. Add descriptions for dfs.namenode.rpc-address and
     dfs.namenode.servicerpc-address to hdfs-default.xml. (Jeff Lord via atm)
 
+    HDFS-3996. Add debug log removed in HDFS-3873 back. (eli)
+
   OPTIMIZATIONS
 
   BUG FIXES 
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/HftpFileSystem.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/HftpFileSystem.java
index 5c536445924..48d0f5c6a63 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/HftpFileSystem.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/HftpFileSystem.java
@@ -254,6 +254,9 @@ public class HftpFileSystem extends FileSystem
                   ", assuming security is disabled");
               return null;
             }
+            if (LOG.isDebugEnabled()) {
+              LOG.debug("Exception getting delegation token", e);
+            }
             throw e;
           }
           for (Token<? extends TokenIdentifier> t : c.getAllTokens()) {