From 150941ea9be28f5df8b5c6cb496d4f3990a70e8c Mon Sep 17 00:00:00 2001
From: Senrian <senagent@github.com>
Date: Tue, 3 Mar 2026 01:34:45 +0000
Subject: [PATCH] [refactor] Use isEmpty() instead of size() == 0 in
 PopBufferMergeService

Use isEmpty() method for better readability and performance.

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

diff --git a/broker/src/main/java/org/apache/rocketmq/broker/processor/PopBufferMergeService.java b/broker/src/main/java/org/apache/rocketmq/broker/processor/PopBufferMergeService.java
index 5373eaea333..c13b1905cea 100644
--- a/broker/src/main/java/org/apache/rocketmq/broker/processor/PopBufferMergeService.java
+++ b/broker/src/main/java/org/apache/rocketmq/broker/processor/PopBufferMergeService.java
@@ -109,7 +109,7 @@ public void run() {
 
                 this.waitForRunning(interval);
 
-                if (!this.serving && this.buffer.size() == 0 && getOffsetTotalSize() == 0) {
+                if (!this.serving && this.buffer.isEmpty() && getOffsetTotalSize() == 0) {
                     this.serving = true;
                 }
             } catch (Throwable e) {