Cannot find package '@aws-sdk/client-s3' in Lambda function with a Layer

[keithwhor]

Checkboxes for prior research

• [X] I've gone through Developer Guide and API reference
• [X] I've checked AWS Forums and StackOverflow.
• [X] I've searched for previous similar issues and didn't find any solution.

Describe the bug

When creating a Lambda Function with a Layer containing nodejs/node_modules, I can no longer access the @aws-sdk v3 inside of my nodejs-20.x functions.

SDK version number

Latest in Lambda

Which JavaScript Runtime is this issue in?

Node.js

Details of the browser/Node.js/ReactNative version

20.x

Reproduction Steps

• Create a Lambda function that imports @aws-sdk/client-s3 with a layer containing nodejs/node_modules/ and any number of modules
• Publish it via createFunction or updateFunctionCode call in Node.js SDK
• Execute via invoke -- should encounter Cannot find package '@aws-sdk/client-s3'

Observed Behavior

Lambda Function throws error; Cannot find package '@aws-sdk/client-s3'

Expected Behavior

Lambda function executes as normal

Possible Solution

Unsure; it seems that mounting a layer unmounts the AWS SDK.

Additional Information/Context

No response

[keithwhor]

I've found that directly importing /var/runtime/node_modules/@aws-sdk/client-s3/dist-cjs/index.js seems to work, but I'm not sure why import resolution doesn't work properly after a layer with node modules is attached?

[aBurmeseDev]

Hi @keithwhor - thanks for reaching out.

I'm going to verify a few things:

• Can you check your SDK version and NodeJS runtime for your Lambda function? Ref: https://docs.aws.amazon.com/lambda/latest/dg/lambda-nodejs.html
• Did you also npm install npm install @aws-sdk/client-s3? Ref: https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/s3/
• What does your Lambda function and SDK code look like?

[github-actions[bot]]

This issue has not received a response in 1 week. If you still think there is a problem, please leave a comment to avoid the issue from automatically closing.

[github-actions[bot]]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs and link to relevant comments in this thread.