Executor Invocation Error due to permissions denied

[regoawt]

Executor Invocation Error due to permissions denied

[regoawt]

Managed to resolve the issue.

I still don't have a good explanation for why I was only getting the error when running the function through the Power Tuner, but as shown in the function error log, it was to do with the permissions of the Lambda package files. I found this issue: aws/aws-cdk#8707 (comment) which pointed me in the right direction.

I had to configure the CDK bundling options of my function to give full permission to every file in the package using chmod:

code=_lambda.Code.from_asset(
    path=os.path.join(os.path.dirname(__file__), "src"),
    bundling=BundlingOptions(
        image=_lambda.Runtime.PYTHON_3_12.bundling_image,
        command=[
            "bash",
            "-c",
            "&&".join(
                [
                    "pip install -r requirements.txt --no-deps --platform manylinux2014_x86_64 -t /asset-output",
                    "cp -au . /asset-output",
                    "chmod -R 777 /asset-output",
                ]
            ),
        ],
        platform="linux/amd64",
    ),
),

[alexcasalboni]

Hey @regoawt thanks for reaching out 🙏

This looks very similar to #242 and it could be related to the function timing out.

#247 has implemented a way to log the exact function invocation error (rather than this stream/array of numbers) and it's been merged, although it hasn't been published as a new SAR version.

I imagine you're deploying using SAR via CDK, right?

I'd suggest to deploy the latest Lambda Power Tuning without using SAR and check if you get a better invocation error.

[regoawt]

@alexcasalboni thanks for the quick reply!

Will take a look at the linked issue. Yes I have deployed using SAR - will deploy the latest version using other means.

[regoawt]

PS it works with 755 permissions as per https://docs.aws.amazon.com/lambda/latest/dg/troubleshooting-deployment.html#troubleshooting-deployment-denied