A TCP request is sent and received. What happens if the receiver terminates and the sender continues sending

After I constructed a pair of TCP servers and clients using NodeJS,

The client sends a TCP request to the server every 5 seconds:

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);
}
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Then I terminate the server side,

On the TCP client I added the following error handling branch:

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);
  })
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Output from the final runtime:

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

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