Handling Concurrent Requests to AWS S3 with Node.js and AWS SDK v3
I can't seem to get I've been banging my head against this for hours. I'm running into a question where concurrent requests to AWS S3 using the AWS SDK for JavaScript v3 in my Node.js application are causing unexpected behavior. Specifically, when I try to upload multiple files simultaneously, some uploads complete successfully, while others return with the behavior message: `behavior: Access Denied`. I've implemented the following code using the `S3Client` and `PutObjectCommand`, but I suspect the scenario may relate to how I'm managing the upload streams. Here's a simplified version of what I'm currently doing: ```javascript import { S3Client, PutObjectCommand } from '@aws-sdk/client-s3'; const s3Client = new S3Client({ region: 'us-west-2' }); async function uploadFile(bucketName, fileName, fileContent) { const command = new PutObjectCommand({ Bucket: bucketName, Key: fileName, Body: fileContent, }); return await s3Client.send(command); } const filesToUpload = [ { name: 'file1.txt', content: 'Content of file 1' }, { name: 'file2.txt', content: 'Content of file 2' }, { name: 'file3.txt', content: 'Content of file 3' } ]; (async () => { const uploadPromises = filesToUpload.map(file => uploadFile('my-bucket', file.name, file.content)); await Promise.all(uploadPromises); })(); ``` I have verified that the IAM policy attached to my user has the correct permissions for S3. It allows `s3:PutObject` for the specified bucket. However, when I run this code, I intermittently receive `Access Denied` errors, particularly when uploading larger files or when multiple uploads overlap. I've tried adding a delay between uploads and adjusting the request concurrency, but the scenario continues. Is there something I might be missing in terms of configuration or best practices for handling concurrent S3 uploads in Node.js? Any guidance or insights would be greatly appreciated. How would you solve this? I'm on CentOS using the latest version of Javascript.