diff --git a/hadoop-common-project/hadoop-kms/src/main/java/org/apache/hadoop/crypto/key/kms/server/KMSAudit.java b/hadoop-common-project/hadoop-kms/src/main/java/org/apache/hadoop/crypto/key/kms/server/KMSAudit.java
index 13a2d5c..f546168 100644
--- a/hadoop-common-project/hadoop-kms/src/main/java/org/apache/hadoop/crypto/key/kms/server/KMSAudit.java
+++ b/hadoop-common-project/hadoop-kms/src/main/java/org/apache/hadoop/crypto/key/kms/server/KMSAudit.java
@@ -191,7 +191,7 @@
   private void op(final OpStatus opStatus, final Object op,
       final UserGroupInformation ugi, final String key, final String remoteHost,
       final String extraMsg) {
-    final String user = ugi == null ? null: ugi.getShortUserName();
+    final String user = ugi == null ? null: ugi.getUserName();
     if (!Strings.isNullOrEmpty(user) && !Strings.isNullOrEmpty(key)
         && (op != null)
         && AGGREGATE_OPS_WHITELIST.contains(op)) {
diff --git a/hadoop-common-project/hadoop-kms/src/main/java/org/apache/hadoop/crypto/key/kms/server/KMSAuditLogger.java b/hadoop-common-project/hadoop-kms/src/main/java/org/apache/hadoop/crypto/key/kms/server/KMSAuditLogger.java
index 2e2ba1d..2534a44 100644
--- a/hadoop-common-project/hadoop-kms/src/main/java/org/apache/hadoop/crypto/key/kms/server/KMSAuditLogger.java
+++ b/hadoop-common-project/hadoop-kms/src/main/java/org/apache/hadoop/crypto/key/kms/server/KMSAuditLogger.java
@@ -77,7 +77,7 @@
         this.user = null;
         this.impersonator = null;
       } else {
-        this.user = ugi.getShortUserName();
+        this.user = ugi.getUserName();
         if (ugi.getAuthenticationMethod()
             == UserGroupInformation.AuthenticationMethod.PROXY) {
           this.impersonator = ugi.getRealUser().getUserName();
diff --git a/hadoop-common-project/hadoop-kms/src/test/java/org/apache/hadoop/crypto/key/kms/server/TestKMSAudit.java b/hadoop-common-project/hadoop-kms/src/test/java/org/apache/hadoop/crypto/key/kms/server/TestKMSAudit.java
index 09145be..2f47ed7 100644
--- a/hadoop-common-project/hadoop-kms/src/test/java/org/apache/hadoop/crypto/key/kms/server/TestKMSAudit.java
+++ b/hadoop-common-project/hadoop-kms/src/test/java/org/apache/hadoop/crypto/key/kms/server/TestKMSAudit.java
@@ -40,7 +40,6 @@
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.Timeout;
-import org.mockito.Mockito;
 
 public class TestKMSAudit {
 
@@ -50,6 +49,8 @@
   private PrintStream capturedOut;
   
   private KMSAudit kmsAudit;
+  private UserGroupInformation luser =
+      UserGroupInformation.createUserForTesting("luser@REALM", new String[0]);
 
   private static class FilterOut extends FilterOutputStream {
     public FilterOut(OutputStream out) {
@@ -95,10 +96,7 @@
   }
 
   @Test
-  @SuppressWarnings("checkstyle:linelength")
   public void testAggregation() throws Exception {
-    UserGroupInformation luser = Mockito.mock(UserGroupInformation.class);
-    Mockito.when(luser.getShortUserName()).thenReturn("luser");
     kmsAudit.ok(luser, KMSOp.DECRYPT_EEK, "k1", "testmsg");
     kmsAudit.ok(luser, KMSOp.DECRYPT_EEK, "k1", "testmsg");
     kmsAudit.ok(luser, KMSOp.DECRYPT_EEK, "k1", "testmsg");
@@ -120,27 +118,30 @@
     kmsAudit.evictCacheForTesting();
     String out = getAndResetLogOutput();
     System.out.println(out);
-    Assert.assertTrue(
-        out.matches(
-            "OK\\[op=DECRYPT_EEK, key=k1, user=luser, accessCount=1, interval=[^m]{1,4}ms\\] testmsg"
+    boolean doesMatch = out.matches(
+        "OK\\[op=DECRYPT_EEK, key=k1, user=luser@REALM, accessCount=1, "
+            + "interval=[^m]{1,4}ms\\] testmsg"
             // Not aggregated !!
-            + "OK\\[op=DELETE_KEY, key=k1, user=luser\\] testmsg"
-            + "OK\\[op=ROLL_NEW_VERSION, key=k1, user=luser\\] testmsg"
-            + "OK\\[op=INVALIDATE_CACHE, key=k1, user=luser\\] testmsg"
+            + "OK\\[op=DELETE_KEY, key=k1, user=luser@REALM\\] testmsg"
+            + "OK\\[op=ROLL_NEW_VERSION, key=k1, user=luser@REALM\\] testmsg"
+            + "OK\\[op=INVALIDATE_CACHE, key=k1, user=luser@REALM\\] testmsg"
             // Aggregated
-            + "OK\\[op=DECRYPT_EEK, key=k1, user=luser, accessCount=6, interval=[^m]{1,4}ms\\] testmsg"
-            + "OK\\[op=DECRYPT_EEK, key=k1, user=luser, accessCount=1, interval=[^m]{1,4}ms\\] testmsg"
-            + "OK\\[op=REENCRYPT_EEK, key=k1, user=luser, accessCount=1, interval=[^m]{1,4}ms\\] testmsg"
-            + "OK\\[op=REENCRYPT_EEK, key=k1, user=luser, accessCount=3, interval=[^m]{1,4}ms\\] testmsg"
-            + "OK\\[op=REENCRYPT_EEK_BATCH, key=k1, user=luser\\] testmsg"
-            + "OK\\[op=REENCRYPT_EEK_BATCH, key=k1, user=luser\\] testmsg"));
+            + "OK\\[op=DECRYPT_EEK, key=k1, user=luser@REALM, accessCount=6, "
+            + "interval=[^m]{1,4}ms\\] testmsg"
+            + "OK\\[op=DECRYPT_EEK, key=k1, user=luser@REALM, accessCount=1, "
+            + "interval=[^m]{1,4}ms\\] testmsg"
+            + "OK\\[op=REENCRYPT_EEK, key=k1, user=luser@REALM, "
+            + "accessCount=1, interval=[^m]{1,4}ms\\] testmsg"
+            + "OK\\[op=REENCRYPT_EEK, key=k1, user=luser@REALM, "
+            + "accessCount=3, interval=[^m]{1,4}ms\\] testmsg"
+            + "OK\\[op=REENCRYPT_EEK_BATCH, key=k1, user=luser@REALM\\] testmsg"
+            + "OK\\[op=REENCRYPT_EEK_BATCH, key=k1, user=luser@REALM\\] "
+            + "testmsg");
+    Assert.assertTrue(doesMatch);
   }
 
   @Test
-  @SuppressWarnings("checkstyle:linelength")
   public void testAggregationUnauth() throws Exception {
-    UserGroupInformation luser = Mockito.mock(UserGroupInformation.class);
-    Mockito.when(luser.getShortUserName()).thenReturn("luser");
     kmsAudit.unauthorized(luser, KMSOp.GENERATE_EEK, "k2");
     kmsAudit.evictCacheForTesting();
     kmsAudit.ok(luser, KMSOp.GENERATE_EEK, "k3", "testmsg");
@@ -159,25 +160,29 @@
     // The UNAUTHORIZED will trigger cache invalidation, which then triggers
     // the aggregated OK (accessCount=5). But the order of the UNAUTHORIZED and
     // the aggregated OK is arbitrary - no correctness concerns, but flaky here.
-    Assert.assertTrue(out.matches(
-        "UNAUTHORIZED\\[op=GENERATE_EEK, key=k2, user=luser\\] "
-            + "OK\\[op=GENERATE_EEK, key=k3, user=luser, accessCount=1, interval=[^m]{1,4}ms\\] testmsg"
-            + "OK\\[op=GENERATE_EEK, key=k3, user=luser, accessCount=5, interval=[^m]{1,4}ms\\] testmsg"
-            + "UNAUTHORIZED\\[op=GENERATE_EEK, key=k3, user=luser\\] "
-            + "OK\\[op=GENERATE_EEK, key=k3, user=luser, accessCount=1, interval=[^m]{1,4}ms\\] testmsg")
-        || out.matches(
-        "UNAUTHORIZED\\[op=GENERATE_EEK, key=k2, user=luser\\] "
-            + "OK\\[op=GENERATE_EEK, key=k3, user=luser, accessCount=1, interval=[^m]{1,4}ms\\] testmsg"
-            + "UNAUTHORIZED\\[op=GENERATE_EEK, key=k3, user=luser\\] "
-            + "OK\\[op=GENERATE_EEK, key=k3, user=luser, accessCount=5, interval=[^m]{1,4}ms\\] testmsg"
-            + "OK\\[op=GENERATE_EEK, key=k3, user=luser, accessCount=1, interval=[^m]{1,4}ms\\] testmsg"));
+    boolean doesMatch = out.matches(
+        "UNAUTHORIZED\\[op=GENERATE_EEK, key=k2, user=luser@REALM\\] "
+            + "OK\\[op=GENERATE_EEK, key=k3, user=luser@REALM, accessCount=1,"
+            + " interval=[^m]{1,4}ms\\] testmsg"
+            + "OK\\[op=GENERATE_EEK, key=k3, user=luser@REALM, accessCount=5,"
+            + " interval=[^m]{1,4}ms\\] testmsg"
+            + "UNAUTHORIZED\\[op=GENERATE_EEK, key=k3, user=luser@REALM\\] "
+            + "OK\\[op=GENERATE_EEK, key=k3, user=luser@REALM, accessCount=1,"
+            + " interval=[^m]{1,4}ms\\] testmsg");
+    doesMatch = doesMatch || out.matches(
+        "UNAUTHORIZED\\[op=GENERATE_EEK, key=k2, user=luser@REALM\\] "
+            + "OK\\[op=GENERATE_EEK, key=k3, user=luser@REALM, accessCount=1,"
+            + " interval=[^m]{1,4}ms\\] testmsg"
+            + "UNAUTHORIZED\\[op=GENERATE_EEK, key=k3, user=luser@REALM\\] "
+            + "OK\\[op=GENERATE_EEK, key=k3, user=luser@REALM, accessCount=5,"
+            + " interval=[^m]{1,4}ms\\] testmsg"
+            + "OK\\[op=GENERATE_EEK, key=k3, user=luser@REALM, accessCount=1,"
+            + " interval=[^m]{1,4}ms\\] testmsg");
+    Assert.assertTrue(doesMatch);
   }
 
   @Test
-  @SuppressWarnings("checkstyle:linelength")
   public void testAuditLogFormat() throws Exception {
-    UserGroupInformation luser = Mockito.mock(UserGroupInformation.class);
-    Mockito.when(luser.getShortUserName()).thenReturn("luser");
     kmsAudit.ok(luser, KMSOp.GENERATE_EEK, "k4", "testmsg");
     kmsAudit.ok(luser, KMSOp.GENERATE_EEK, "testmsg");
     kmsAudit.evictCacheForTesting();
@@ -187,12 +192,15 @@
     String out = getAndResetLogOutput();
     System.out.println(out);
     Assert.assertTrue(out.matches(
-        "OK\\[op=GENERATE_EEK, key=k4, user=luser, accessCount=1, interval=[^m]{1,4}ms\\] testmsg"
-            + "OK\\[op=GENERATE_EEK, user=luser\\] testmsg"
-            + "OK\\[op=GENERATE_EEK, key=k4, user=luser, accessCount=1, interval=[^m]{1,4}ms\\] testmsg"
-            + "UNAUTHORIZED\\[op=DECRYPT_EEK, key=k4, user=luser\\] "
-            + "ERROR\\[user=luser\\] Method:'method' Exception:'testmsg'"
-            + "UNAUTHENTICATED RemoteHost:remotehost Method:method URL:url ErrorMsg:'testmsg'"));
+        "OK\\[op=GENERATE_EEK, key=k4, user=luser@REALM, accessCount=1, "
+            + "interval=[^m]{1,4}ms\\] testmsg"
+            + "OK\\[op=GENERATE_EEK, user=luser@REALM\\] testmsg"
+            + "OK\\[op=GENERATE_EEK, key=k4, user=luser@REALM, accessCount=1,"
+            + " interval=[^m]{1,4}ms\\] testmsg"
+            + "UNAUTHORIZED\\[op=DECRYPT_EEK, key=k4, user=luser@REALM\\] "
+            + "ERROR\\[user=luser@REALM\\] Method:'method' Exception:'testmsg'"
+            + "UNAUTHENTICATED RemoteHost:remotehost Method:method URL:url "
+            + "ErrorMsg:'testmsg'"));
   }
 
   @SuppressWarnings("unchecked")