From 3af4d78ea3da57b593b67d6a7c944bdee9e26007 Mon Sep 17 00:00:00 2001
From: Senrian <senagent@github.com>
Date: Mon, 2 Mar 2026 13:37:15 +0000
Subject: [PATCH] [refactor] Use isEmpty() instead of size() in
 TopicQueueMappingManager

Signed-off-by: Senrian <senrian@github.com>
---
 .../apache/rocketmq/broker/topic/TopicQueueMappingManager.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/broker/src/main/java/org/apache/rocketmq/broker/topic/TopicQueueMappingManager.java b/broker/src/main/java/org/apache/rocketmq/broker/topic/TopicQueueMappingManager.java
index 6b9cf159383..2e1c4d0a777 100644
--- a/broker/src/main/java/org/apache/rocketmq/broker/topic/TopicQueueMappingManager.java
+++ b/broker/src/main/java/org/apache/rocketmq/broker/topic/TopicQueueMappingManager.java
@@ -231,7 +231,7 @@ public TopicQueueMappingContext buildTopicQueueMappingContext(TopicRequestHeader
         List<LogicQueueMappingItem> mappingItemList = TopicQueueMappingDetail.getMappingInfo(mappingDetail, globalId);
         LogicQueueMappingItem leaderItem = null;
         if (mappingItemList != null
-                && mappingItemList.size() > 0) {
+                && !mappingItemList.isEmpty()) {
             leaderItem = mappingItemList.get(mappingItemList.size() - 1);
         }
         return new TopicQueueMappingContext(topic, globalId, mappingDetail, mappingItemList, leaderItem);