websocket连接时好时坏的问题

websocket建立连接有些时候能成功，有些时候不能成功。
连接成功并订阅主题后，有些时候能成功收到后台推送的消息，但是大多数时候不能收到，后台消息一直在推送。

let socketUrl="xxxxxx";
var sockJS = new SockJS(socketUrl);
this.stompClient = Stomp.over(sockJS);
window.GpsWebSocket = this.stompClient;
window.GpsWebSocket.onclose=this.WebSocketClose;
window.GpsWebSocket.onerror=this.WebSocketError;
this.stompClient.connect({}, () => {
       console.log("WebSocket已连接！");
      this.stompClient.subscribe("/users/" + xx + "/xxx",  (msg) => {}，{}）
}, function () {
        console.log("WebSocket连接失败！")
});

let path = "xxxx"
let socket = ""
init: function() {
      if (typeof WebSocket === "undefined") {
        alert("您的浏览器不支持socket");
      } else {
        // 实例化socket
        this.socket = new WebSocket(this.path);
        // 监听socket连接
        this.socket.onopen = this.open;
        // 监听socket错误信息
        this.socket.onerror = this.error;
        // 监听socket消息
        this.socket.onmessage = this.getMessage;
      }
    },
    open: function() {
      console.log("socket连接成功");
    },
    error: function() {
      swd.toast({
        type: "fail",
        content: "连接错误"
      });
      console.log("连接错误");
    },
        //获取后台返回数据
    getMessage: function(msg) {
      // console.log("这是什么", JSON.parse(msg.data));
    },
    send: function() {
      this.socket.send(params);
    },
    close: function() {
      console.log("socket已经关闭");
    },