Mongodump with tunnel-ssh throwing ECONNRESET error in nodejs - node.js

Question

I am creating a backup using mongodump from a remote mongo server. The remote mongo requires a private key so I cannot directly run the mongodump command directly. I need to create a ssh tunnel to the server first. My ssh tunneling works fine in the code below since I have tested it by querying on remote mongo.
The issue is when I run the mongodump query, the dump is created fine but just as the query finish I get this ECONNRESET error below
Error: read ECONNRESET
at TCP.onStreamRead (internal/stream_base_commons.js:208:20)
Emitted 'error' event on Server instance at:
at Socket.emit (events.js:326:22)
at Socket.EventEmitter.emit (domain.js:483:12)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21) {
errno: 'ECONNRESET',
code: 'ECONNRESET',
syscall: 'read'
}
My code snippet looks like this:
const sshConfig = {
username: process.env.BACKUP_MONGO_USER,
port: 22,
dstPort: 27017,
localPort: 27018,
host: process.env.BACKUP_MONGO_HOST,
dstHost: '127.0.0.1',
localHost: '127.0.0.1',
privateKey: fs.readFileSync(process.env.BACKUP_MONGO_FILE),
keepAlive: true,
};
const connection = new Promise((resolve, _) => {
// eslint-disable-next-line
tunnel(sshConfig,
async (err, server) => {
resolve({ server });
},
);
});
async function dbDump() {
const { server } = await connection;
console.log('Connection Successful');
const command = `mongodump --db <dbName> --collection <collectionName> --host localhost --port 27018`;
exec(command,
(err, stdout, stderr) => {
if(err) { console.log('err', err); }
if(stderr) { console.log('stderr', stderr); }
if(stdout) { console.log('stdout', stdout); }
server.close();
});
}
dbDump();