Failed to connect with RabbitMQ server when sending large amount of messages - node.js

Question

I am using Cloudamqp to connect with RabbitMq when I am trying to send 10 messages its publishing data successfully to the queue but when I am trying to send 2,000 messages its showing connection failed error shown below:
Error Error: connect ECONNREFUSED 15.206.75.114:5671
at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1247:16) {
errno: -111,
code: 'ECONNREFUSED',
syscall: 'connect',
address: '15.206.75.114',
port: 5671
}
Error Error: Expected ConnectionOpenOk; got <ConnectionClose channel:0>
at /home/digvijay/test/test-lorien/node_modules/amqplib/lib/connection.js:167:14
at /home/digvijay/test/test-lorien/node_modules/amqplib/lib/connection.js:159:12
at TLSSocket.recv (/home/digvijay/test/test-
lorien/node_modules/amqplib/lib/connection.js:507:12)
I am reading the Excel file using XLSX library and sending those rows to the queue. Below is my code:
const express = require('express');
const XLSX = require("xlsx");
const amqp = require('amqplib/callback_api');
const app = express();
const port = process.env.PORT || 3300;
// Reading our test file
const file = XLSX.readFile('./limit9.xlsx')
app.get('/', (req, res) => {
const sheets = file.SheetNames;
for (let i = 0; i < sheets.length; i++) {
const temp = XLSX.utils.sheet_to_json(
file.Sheets[file.SheetNames[i]])
temp.forEach((res) => {
sendData(res); //Here sending data to the queue
});
}
});
function sendData(res) {
amqp.connect(`amqps://nuogafvveJoldl_RhEyfs7qJzX0BIRep6J8rFIN-0#puffin.rmq2.cloudamqp.com/xxxxxxx`, (err, connection) => {
if (err) {
console.log("Error",err);
}
else {
connection.createChannel((err, channel) => {
if (err) {
throw err;
}
else {
let queu = "review_data";
channel.assertQueue(queu, {
durable: false
});
var json = JSON.stringify(res);
channel.sendToQueue(queu, Buffer.from(json));
}
});
}
});
}
Why is it throwing connection error when I am sending large amount of messages but works fine for sending few messages?