diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
index 7fc025afd63..707321d229e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
@@ -1131,16 +1131,17 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
 
   // Exposed for testing
   static interface LogDelegate {
-    void logBatchWarning(int sum, int rowSizeWarnThreshold);
+    void logBatchWarning(String firstRegionName, int sum, int rowSizeWarnThreshold);
   }
 
   private static LogDelegate DEFAULT_LOG_DELEGATE = new LogDelegate() {
     @Override
-    public void logBatchWarning(int sum, int rowSizeWarnThreshold) {
+    public void logBatchWarning(String firstRegionName, int sum, int rowSizeWarnThreshold) {
       if (LOG.isWarnEnabled()) {
         LOG.warn("Large batch operation detected (greater than " + rowSizeWarnThreshold
             + ") (HBASE-18023)." + " Requested Number of Rows: " + sum + " Client: "
-            + RpcServer.getRequestUserName() + "/" + RpcServer.getRemoteAddress());
+            + RpcServer.getRequestUserName() + "/" + RpcServer.getRemoteAddress()
+            + " first region in multi=" + firstRegionName);
       }
     }
   };
@@ -2513,11 +2514,15 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
 
   private void checkBatchSizeAndLogLargeSize(MultiRequest request) {
     int sum = 0;
+    String firstRegionName = null;
     for (RegionAction regionAction : request.getRegionActionList()) {
+      if (sum == 0) {
+        firstRegionName = Bytes.toStringBinary(regionAction.getRegion().getValue().toByteArray());
+      }
       sum += regionAction.getActionCount();
     }
     if (sum > rowSizeWarnThreshold) {
-      ld.logBatchWarning(sum, rowSizeWarnThreshold);
+      ld.logBatchWarning(firstRegionName, sum, rowSizeWarnThreshold);
     }
   }
 
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiLogThreshold.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiLogThreshold.java
index 6a5dc6495df..e18e8ddad79 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiLogThreshold.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiLogThreshold.java
@@ -117,25 +117,25 @@ public class TestMultiLogThreshold {
   @Test
   public void testMultiLogThresholdRegionActions() throws ServiceException, IOException {
     sendMultiRequest(THRESHOLD + 1, ActionType.REGION_ACTIONS);
-    verify(LD, Mockito.times(1)).logBatchWarning(Mockito.anyInt(), Mockito.anyInt());
+    verify(LD, Mockito.times(1)).logBatchWarning(Mockito.anyString(), Mockito.anyInt(), Mockito.anyInt());
   }
 
   @Test
   public void testMultiNoLogThresholdRegionActions() throws ServiceException, IOException {
     sendMultiRequest(THRESHOLD, ActionType.REGION_ACTIONS);
-    verify(LD, Mockito.never()).logBatchWarning(Mockito.anyInt(), Mockito.anyInt());
+    verify(LD, Mockito.never()).logBatchWarning(Mockito.anyString(), Mockito.anyInt(), Mockito.anyInt());
   }
 
   @Test
   public void testMultiLogThresholdActions() throws ServiceException, IOException {
     sendMultiRequest(THRESHOLD + 1, ActionType.ACTIONS);
-    verify(LD, Mockito.times(1)).logBatchWarning(Mockito.anyInt(), Mockito.anyInt());
+    verify(LD, Mockito.times(1)).logBatchWarning(Mockito.anyString(), Mockito.anyInt(), Mockito.anyInt());
   }
 
   @Test
   public void testMultiNoLogThresholdAction() throws ServiceException, IOException {
     sendMultiRequest(THRESHOLD, ActionType.ACTIONS);
-    verify(LD, Mockito.never()).logBatchWarning(Mockito.anyInt(), Mockito.anyInt());
+    verify(LD, Mockito.never()).logBatchWarning(Mockito.anyString(), Mockito.anyInt(), Mockito.anyInt());
   }
 
 }