Lambda function is not triggered for all the s3 image upload - amazon-web-services

Question

I have s3 bucket as below,
myBucket
a/
b/
c/
where myBucket is a s3 bucket and a, b, c are the key folders inside that bucket.
I will upload images into a/. The s3 event notification will trigger SQS which will then trigger lambda function which does the process of removing image background and uploads into b/ folder.
The problem here is for example, if I upload a folder which has around 26 images into s3 only 23 or 22 images are getting triggered by lambda and only those images are getting are processed.
For some reason s3 is not triggering all the images or is that something I should configure in my lambda function?
Here is my function code
exports.handler = async(event, context, callback) => {
try {
console.log(event.Records[0]);
var json = JSON.parse(event.Records[0]['body']);
console.log('json: '+json);
json = JSON.parse(json['Message']);
json = json['Records'][0]['s3'];
console.log(json);
var srcBucket = json['bucket']['name'];
console.log('srcBucket: ' + srcBucket);
var srcKey = decodeURIComponent(json['object']['key'].replace(/\+/g, ' '));
console.log('srcKey: ' + srcKey);
var str = (srcKey.split('/').pop()).split('.')[0];
console.log('str: ' + str);
if (str != '') {
var folderPath = srcKey.substr(srcKey.indexOf('/') + 1).split('.')[0];
folderPath = folderPath.substring(0, folderPath.lastIndexOf('/'));
console.log('folderPath: ' + folderPath);
const params1 = { Bucket: srcBucket, Key: srcKey };
var origimage = await s3.getObject(params1).promise();
var destObject = await origimage.Body;
var destKey = 'removebg/' + folderPath + '/' + str + '.jpg';
var options = {
'method': 'POST',
'url': 'https://api.remove.bg/v1.0/removebg',
'headers': {
'X-Api-Key': 'xxxxxxxxxxx'
},
formData: {
'image_file': destObject,
'size': 'auto'
},
encoding: null
};
request(options, function(error, response, body) {
if (error) {
console.log(error);
sendmessage(error, 'Error removing image background', arn, srcBucket + '/' + srcKey, destBucket + destKey);
}
var params = { Bucket: destBucket, Key: destKey, Body: body };
s3.upload(params, function(err, data) {
if (err) {
console.log('Error uploading data: ', err);
sendmessage(err, 'Error uploading transparent image to s3', arn, srcBucket + '/' + srcKey, destBucket + destKey);
}
else { console.log('Successfully uploaded data to ' + destBucket); }
});
});
}
}
catch (e) {
console.log(e);
}
callback(null, 'All done!');
};
Please let me know. Thanks in advance.

Answer 1

I think your problem lies on these lines:
console.log(event.Records[0]);
var json = JSON.parse(event.Records[0]['body']);
console.log('json: '+json);
json = JSON.parse(json['Message']);
json = json['Records'][0]['s3'];
Your function is only looking at the first record that is provided to the function. Multiple events can be given the the Lambda function, so your function should loop through the Records entries and process all of the events that are provided.
It should do something like:
for record in event.Records:
console.log(record);
var json = JSON.parse(record['body']);
console.log('json: '+json);
json = JSON.parse(json['Message']);
json = record['s3'];