diff --git a/src/main/java/com/ruoyi/device/websocket/StatisticsWebSocket.java b/src/main/java/com/ruoyi/device/websocket/StatisticsWebSocket.java
index 9da2fe3..1fd6ac1 100644
--- a/src/main/java/com/ruoyi/device/websocket/StatisticsWebSocket.java
+++ b/src/main/java/com/ruoyi/device/websocket/StatisticsWebSocket.java
@@ -28,7 +28,11 @@ public class StatisticsWebSocket {
     @OnClose
     public void onClose() {
         sessions.remove(this);
-        log.info("WebSocket连接关闭: sessionId={}", session.getId());
+        if (session != null) {
+            log.info("WebSocket连接关闭: sessionId={}", session.getId());
+        } else {
+            log.info("WebSocket连接关闭: session为null");
+        }
     }
 
     @OnMessage