From 4f18b0d7754d995daa949b167ea84e886d6b7f44 Mon Sep 17 00:00:00 2001
From: huangli <areyouok@gmail.com>
Date: Fri, 10 Dec 2021 22:04:21 +0800
Subject: [PATCH] [ISSUE 3585] [Part A] eliminate reverse DNS lookup in
 MessageExt (#3586)

---
 .../java/org/apache/rocketmq/common/message/MessageExt.java   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common/src/main/java/org/apache/rocketmq/common/message/MessageExt.java b/common/src/main/java/org/apache/rocketmq/common/message/MessageExt.java
index 577c4f4bc1..133cb93ba0 100644
--- a/common/src/main/java/org/apache/rocketmq/common/message/MessageExt.java
+++ b/common/src/main/java/org/apache/rocketmq/common/message/MessageExt.java
@@ -153,6 +153,10 @@ public class MessageExt extends Message {
 
     public String getBornHostNameString() {
         if (null != this.bornHost) {
+            if (bornHost instanceof InetSocketAddress) {
+                // without reverse dns lookup
+                return ((InetSocketAddress) bornHost).getHostString();
+            }
             InetAddress inetAddress = ((InetSocketAddress) this.bornHost).getAddress();
 
             return null != inetAddress ? inetAddress.getHostName() : null;