RabbitMQ HeartBeat Timeout issue - node.js

Question

I'm currently using RabbitMQ as a message broker. Recently, I see many error HeartBeat Timeout in my error log.
Also in RabbitMQ log, I see this log:
I don't know why there is too many connection from vary ranges of port. I use default setup without any further configuration.
Here is my code used to publish and consume:
import { connect } from 'amqplib/callback_api';
import hanlder from '../calculator/middleware';
import { logger } from '../config/logger';
async function consumeRabbitMQServer(serverURL, exchange, queue) {
connect('amqp://localhost', async (error0, connection) => {
if (error0) throw error0;
const channel = connection.createChannel((error1) => {
if (error1) throw error1;
});
channel.assertExchange(exchange, 'direct', {
durable: true
});
channel.assertQueue(
queue,
{
durable: true
},
(error2) => {
if (error2) throw error2;
logger.info(`Connect to ${serverURL} using queue ${queue}`);
}
);
channel.prefetch(1);
channel.bindQueue(queue, exchange, 'info');
channel.noAck = true;
channel.consume(queue, (msg) => {
hanlder(JSON.parse(msg.content.toString()))
.then(() => {
channel.ack(msg);
})
.catch((err) => {
channel.reject(msg);
});
});
});
}
export default consumeRabbitMQServer;
Code used to publish message:
import createConnection from './connection';
import { logger } from '../config/logger';
async function publishToRabbitMQServer(serverURL, exchange, queue) {
const connection = createConnection(serverURL);
const c = await connection.then(async (conn) => {
const channel = await conn.createChannel((error1) => {
if (error1) throw error1;
});
channel.assertExchange(exchange, 'direct', {
durable: true
});
channel.assertQueue(
queue,
{
durable: true
},
(error2) => {
if (error2) throw error2;
logger.info(`Publish to ${serverURL} using queue ${queue}`);
}
);
channel.bindQueue(queue, exchange, 'info');
return channel;
});
return c;
}
export default publishToRabbitMQServer;
Whenever I start my server, I run this piece of code to create a client consume to RabbitMQ:
const { RABBITMQ_SERVER } = process.env;
consumeRabbitMQServer(RABBITMQ_SERVER, 'abc', 'abc');
And this piece of code is used when ever a message in need published to RabbitMQ
const payloads = call.request.payloads;
const { RABBITMQ_SERVER } = process.env;
const channel = await publishToRabbitMQServer(RABBITMQ_SERVER, 'abc', 'abc');
for (let i = 0; i < payloads.length; i++) {
channel.publish('abc', 'info', Buffer.from(JSON.stringify(payloads[i])));
}
I'm reusing code from RabbitMQ document, and it seem that this problem happen whenever there are too many user publish message. Thanks for helping.
Update: I think the root cause is when I need to publish a message, I create a new connection. I'm working to improve it, any help is appreciate. Many thanks.