nodejs使用socket.io传输大文件，一上传，就重连......

Question

采用分片上传
服务端:
io.on('connection', (socket) => {

console.log('socket===>>>', socket.id);
socket.on('upload', (msg) => {
  console.log('upload===>>>', msg);
  uploadio(msg, socket);
});
socket.on('merge', (msg) => {
  console.log('merge===>>>', msg);
  merge(msg, socket);
});

});

客户端：

  const that = this;
  this.socket = io('', {
    query: { room: 'upload', userId: `client_${Math.random()}` }
  });
  this.socket.on('connect', function() {
    console.log('连接成功');
  });
  // socket.on("event", function (data) {});
  this.socket.on('disconnect', function(err) {
    console.log(`断开连接${err}`);
  });
  this.socket.on('reconnect', function(data) {
    console.log(`重新连接${data}`);
  });
  this.socket.on('uploaded', () => {
    that.chunkDoneTotal += 1;
    if (that.chunkTotal === that.chunkDoneTotal) {
      that.socket.emit('merge', {
        chunkSize: that.chunkSize,
        name: that.fileName,
        total: that.chunkTotal,
        hash: that.fileHash,
      });
    }
  });
  this.socket.on('done', () => {
    showTips('success', '文件分片上传完结并合并成功');
  });

发现上传小文件是可以的，只要一分片就必重连接

重连后，服务端，无法监听到upload事件，开始以为是缓冲区问题，设置了缓冲区大小还是不行

const io = require('socket.io')(server, { maxhttpbuffersize: 1024 1024 100 });

求问，是啥原因呢？