From 1c9549b105375fdfb23b767ef1af308f0c047df6 Mon Sep 17 00:00:00 2001
From: xce <mahuanran01@gamil.com>
Date: Sun, 18 Jan 2026 19:01:34 +0800
Subject: [PATCH] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=97=A0=E7=94=A8=E5=88=A4?=
 =?UTF-8?q?=E6=96=AD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/agri/framework/interceptor/MqttMessageHandler.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/agri-framework/src/main/java/com/agri/framework/interceptor/MqttMessageHandler.java b/agri-framework/src/main/java/com/agri/framework/interceptor/MqttMessageHandler.java
index bc2252c..0703736 100644
--- a/agri-framework/src/main/java/com/agri/framework/interceptor/MqttMessageHandler.java
+++ b/agri-framework/src/main/java/com/agri/framework/interceptor/MqttMessageHandler.java
@@ -372,7 +372,7 @@ public class MqttMessageHandler implements SmartLifecycle {
                 // 新增：只有在线才转发；不在线就清理残留订阅，解决“取消订阅失败兜底”
                 String onlineKey = "online:" + clientId;
                 Boolean online = stringRedisTemplate.hasKey(onlineKey);
-                if (online == null || !online) {
+                if (!online) {
                     // 不在线：从两边索引移除（避免一直给离线前端发）
                     stringRedisTemplate.opsForSet().remove("sub:" + deviceId, clientId);
                     stringRedisTemplate.opsForSet().remove("subc:" + clientId, deviceId);