Got Error: Stream yields empty buffer when resizing images from S3 with local node service

I have a really similar approach as: Resizing image with nodeJs and AWS. And I still get the same error when I run my service locally on Windows 10. It works on lambda cloud flawless. I found this discussion about how limited memory or limited timeout could throw an stderr in gm: Stream yields empty buffer error when processing large image files using gm. Besides, this discussion also mentioned about how limited memory will make your lambda service vulnerable and not robust: In amazon lambda, resizing multiple thumbnail sizes in parallel async throws Error: Stream yields empty buffer. However, I'm running this node service locally with plenty of idle memory, I shouldn't run into this "limited memory" trap all the time. I'm thinking this problem is from gm. And here is my code:

async.forEachOf(_sizesArray, function(value, key, callback) { async.waterfall([ function download(next) { s3.getObject({ Bucket: srcBucket, Key: srcKey }, next); }, function convert(response, next) { console.log(response.Body); gm(response.Body,srcKey).antialias(true).density( 300).toBuffer('JPG', function(err, buffer) { if (err) { console.log(err + "\n\nfrom convert\n"); next(err); } else { next(null, buffer); } }); }, function process(response, next) { gm(response).size(function(err, size) { var scalingFactor = Math.min( _sizesArray[key].width / size.width, _sizesArray[ key].width / size.height ); var width = scalingFactor * size.width; var height = scalingFactor * size.height; var index = key; this.resize(width, height).toBuffer( 'JPG', function(err, buffer) { if (err) { console.log(err+"\n\nfrom process\n"); next(err); } else { next(null,buffer,key); } }); }); }, function upload(data, index, next) { s3.putObject({ Bucket: dstBucket, Key: myPath + "/" + fileName.slice(0, -4) + _sizesArray[index].suffix + ".jpg", Body: data, ContentType: 'JPG' }, next); } ], function(err, result) { if (err) { console.error(err); } console.log("End of step " + key); callback(); }); }, function(err) { if (err) { console.error('Unable to resize ' + srcBucket + '/' + srcKey + ' and upload to ' + dstBucket + myPath + '/' + ' due to an error: ' + err); } else { console.log('Successfully resized ' + srcBucket + ' and uploaded to ' + dstBucket + '/' + myPath + '/'); } cb(myPath+"/"+fileName); }); 

To be more specific, my async.waterfall() function will be exited when executing function convert(res,next) and toBuffer() will throw the error I mentioned in the question title.