SDK nodejs 3.1.1 - cluster closed OR program not ending OR program stopping with no reason

/*****************************************************************************

 		import & def

*****************************************************************************/

import couchbase from'couchbase'

import nconf from 'nconf'

import {files} from '../util/export.js'

const SFP = function(p){return p.then(d=>[null,d],e=>[e])}

nconf

	.argv()

	.file(files.setPathFor(`./configs/${nconf.get('env')||'dev'}.config.json`))

	.required(['config','config:db','config:logger'])

function dbConfig(params){

	var {

		protocol,

		user,

		password,

		url,

		port,

		cluster,

	} = params

	return {

		url:new URL(`${protocol}://${url}`).toString(),

		opt:{

			username:user,

			password,

			// logFunc:(...a)=>console.log(JSON.stringify(a))

		}

	}

}

const db = dbConfig(nconf.get('config:db'))

var connectOpt = [db.url,db.opt]

const opTIMEOUT = {timeout:10} //s

// connect for cluster manager

var cluster = await couchbase.connect(...connectOpt)

var clustermanager = cluster.buckets()

var bucketOpt = {

//	name:'testing',

// 	bucketType:base or ephermeal,

	ramQuotaMB:100, // 

	replicaNumber:0,

	ConflictResolutionType:"seqno"

	// flushEnabled:false,

	// managementTimeout:1,

	// kvTimeout:1,

}

/*****************************************************************************

 		process function

*****************************************************************************/

async function process(bucketSettings){

	var [err,res] = await SFP(clustermanager.createBucket(bucketSettings))

	console.log('createBucket 1 - expected:undefined,true - result:',bucketSettings.name,err?.message,res)

	// expected err=null, res = true

	var [err,res] = await SFP(clustermanager.createBucket(bucketSettings))

	console.log('createBucket 2 - expected:error exists,undefined - result:',bucketSettings.name,err?.message,res)

	// expected err=null, res = bucket exists

	var bucket = cluster.bucket(bucketSettings.name)

	var collectionOpt = {

		name:'collecTest',

		scopeName:'scopeTest',

		maxExpiry:120

	}

	var manager = bucket.collections()

	var [err,scopeRes] = await SFP(manager.createScope(collectionOpt.scopeName,opTIMEOUT))

	console.log('createScope 1 - expected:undefined,true - result:', err?.message,scopeRes)

	var [err,scopeRes] = await SFP(manager.createScope(collectionOpt.scopeName,opTIMEOUT))

	console.log('createScope 2 - expected:error exists,undefined - result:',err?.message,scopeRes)

	var scope = bucket.scope(collectionOpt.scopeName)

	var [err,collectionRes] = await SFP(manager.createCollection(collectionOpt,opTIMEOUT))

	console.log('createCollection 1 - expected:undefined,true - result:', err?.message,collectionRes)

	var [err,collectionRes] = await SFP(manager.createCollection(collectionOpt,opTIMEOUT))

	console.log('createCollection 2 - expected:error exists,undefined - result:',err?.message,collectionRes)

	var collection = bucket.collection(collectionOpt.scopeName)

}

/*****************************************************************************

 		run

*****************************************************************************/

// BASE

var bucketOptBase = {

	...bucketOpt,

	name:'testingBase',

	bucketType:couchbase.BucketType.Couchbase

}

console.log('START',bucketOptBase.name)

await process(bucketOptBase)

console.log('DONE',bucketOptBase.name)

// EPHEMERAL

var bucketOptEphermer = {

	...bucketOpt,

	name:'testingEphermeral',

	bucketType:couchbase.BucketType.Ephemeral

}

console.log('START',bucketOptEphermer.name)

await process(bucketOptEphermer)

console.log('DONE',bucketOptEphermer.name)