Parsing CSV in Lambda using Node JS

I am trying to parse a CSV file from S3 with Node JS hosted by AWS Lambda. I have tried using both fast-csv and csv-parser npm. However, both of my solutions would result in Lambda function failure caused by Error: write after end. Thanks for the help.

// dependencies
const csv = require('fast-csv');
const parse = require('csv-parser')
const aws = require('aws-sdk');
const s3 = new aws.S3({ apiVersion: '2006-03-01' });
const uuidv4 = require('uuid/v4');

// read S3 object stream
var s3Stream = s3.getObject(params, (err, data) => {
    if (err) {
        console.log(err);
        const message = `Error getting object ${key} from bucket ${bucket}. Make sure they exist and your bucket is in the same region as this function.`;
        console.log(message);
        callback(message);
    } else {
        console.log('CONTENT TYPE:', data.ContentType);
        callback(null, data.ContentType);
    }
}).createReadStream();


// read CSV with fast-csv
// options for fast-csv npm
var options = {
  headers:true,
  escape:'\\',
  trim:true,
};

csv.fromStream(s3Stream, options).on("data", function(data) {
  data.id = uuidv4();
  data.createDate = new Date().toISOString();
  console.log(data);
}).on("error", function(data) {
  console.error("Got an error: " + data);
}).on("end", function() {
  console.log("Done reading.");
});


// read CSV with csv-parser
var otherOptions = {
  columns : true,
  auto_parse : true,
  escape : '\\',
  trim : true,
};
var parser = parse(otherOptions);
parser.on('data', function(data) {
    data.id = uuidv4();
    data.createDate = new Date().toISOString();
    console.log(data);
})
.on('end',function(data) {
  //do something wiht csvData
  console.log(data);
});
s3Stream.pipe(parser);

via derrdji