From 68d585835052dff371f6371a92f5e6d3a304af0d Mon Sep 17 00:00:00 2001
From: xieb <vip_xiaobin810@163.com>
Date: Sat, 23 Sep 2023 10:33:30 +0800
Subject: [PATCH] 解决ws发送异常

---
 src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java b/src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java
index b605cf9..e394e04 100644
--- a/src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java
+++ b/src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java
@@ -62,12 +62,14 @@
             TextMessage data = new TextMessage(mapper.writeValueAsBytes(message));
 
             for (ConcurrentWebSocketSession session : sessions) {
-                if (!session.isOpen()) {
-                    session.close();
-                    log.debug("This session is closed.");
-                    return;
+                if (!Objects.isNull(session)) {
+                    if (!session.isOpen()) {
+                        session.close();
+                        log.debug("This session is closed.");
+                        return;
+                    }
+                    session.sendMessage(data);
                 }
-                session.sendMessage(data);
             }
 
         } catch (IOException e) {

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