diff --git a/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/KerberosAuthenticationHandler.java b/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/KerberosAuthenticationHandler.java
index 121d96628b..d7145b1824 100644
--- a/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/KerberosAuthenticationHandler.java
+++ b/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/KerberosAuthenticationHandler.java
@@ -160,6 +160,7 @@ public void init(Properties config) throws ServletException {
 
       KerberosConfiguration kerberosConfiguration = new KerberosConfiguration(keytab, principal);
 
+      LOG.info("Login using keytab "+keytab+", for principal "+principal);
       loginContext = new LoginContext("", subject, null, kerberosConfiguration);
       loginContext.login();
 
diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index 192331ab74..0405b17a56 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -57,6 +57,8 @@ Trunk (unreleased changes)
     HADOOP-7695. RPC.stopProxy can throw unintended exception while logging
                  error (atm)
 
+    HADOOP-7721. Add log before login in KerberosAuthenticationHandler. (jitendra)
+
 Release 0.23.0 - Unreleased
 
   INCOMPATIBLE CHANGES