bug: ws onerror remove connectiong

src/main/java/com/huiju/estateagents/websocket/ChatServer.java

     public void onError(Session session, Throwable error) {
         log.error("发生错误");
         error.printStackTrace();
+        webSocketSet.remove(this);
     }
+
     /**
      * 实现服务器主动推送
      */
                     item.sendMessage(message);
                 }
             } catch (IOException e) {
+                log.error("推送消息错误: " + e.getMessage());
                 continue;
             }
         }