TCP请求发送和接收，如果接收端终止，发送端继续发送会出什么错

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我利用nodejs构造了一对TCP服务器和客户端之后，

客户端每隔5秒向服务器端发送一个TCP请求：

function doRunLoopDo() {
log.info('timeout')
  pushNotificationTest();
  setTimeout(() => {
    doRunLoopDo();
  }, 5000);
}

function pushNotificationTest() {
  let pushMessage = {
      command: 'newElement',
      method: 'broadcastToGroup',
      data: {group: "gui" },
      id: Math.floor(Math.random() * 1e100),
      dateTime: Date.now(),
      value: Math.floor(Math.random() * 1000)
     }
    TCPClient.sendMessage(pushMessage);
}

然后我终止服务器端，

在TCP客户端我加上了如下的错误处理分支：

async function startClient(ip = configJson.TCP.client.ip, port = configJson.TCP.client.port) {
	client = new net.Socket();
	await client.connect(port, ip, () => {
      console.log(" in tcpclient.js connect callback!!!");
	});

  client.on('error', (error) => {
    log.info('TCP Client: Connection error - destroy Connection '+error);
  })

最后运行时的输出：

2019-02-22 14:55:07 [ INFO - Jerry Statemachine] TCP Client: Connection error - destroy Connection Error: This socket is closed

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