Comprehend/Groundtruth PDF labeling job creation fails due to folder structure for manifest file (?)

Question

I'm following the official tutorial for the creation of a PDF labeling/annotation job: https://docs.aws.amazon.com/comprehend/latest/dg/cer-annotation-pdf.html
I checked all the created roles, buckets, lambdas, etc for permissions and everything seems OK
But after I run the script in the "Creating an annotation job" section, I get this error in the labeling job after it is created:

"401 UnknownError: The specified key output/apsis-labeling-hope-labeling-job-20241016T022122/apsis-johnny-ra/manifests/output/output.manifest isn't present in the S3 bucket comprehend-semi-structured-docs-us-east-1-575108929836."

"Status
 Failed
Reason for failure
ClientError: Exception invoking the Lambda function arn:aws:lambda:us-east-1:575108929836:function:sam-app-GTPreHumanTaskLambdaFunction-ZkgqFDG1mYph. LambdaErrorCode: AccessDeniedException. Ensure the Lambda function exists, that the role arn:aws:iam::[...]:role/service-role/AmazonSageMaker-ExecutionRole-[...] has permissions to invoke it and try your request again."

I noticed that the folder structure the script is creating isn't the same as the expected for the manifest file, which may be the reason that the error says the manifest isn't present, inside the "comprehend-semi-structure-docs-us-east-1-[number] > output > folder > manifests/" directory apparently there was supposed to be an "outputs" folder in it with the manifest file inside, instead it's creating an "intermediate" folder with another folder called "1/" inside and in this folder the manifest is being created, I'm not sure why this folder structure is being created instead, I just followed the tutorial from the link

Alex T · Answer

The `output.manifest` is usually the [final consolidated output file](https://docs.aws.amazon.com/sagemaker/latest/dg/sms-data-output.html#sms-output-directories) from a SMGT labelling job, while the "PreHumanTaskLambda" function is usually a function called to [transform](https://docs.aws.amazon.com/sagemaker/latest/dg/sms-custom-templates-step3-lambda-requirements.html) an individual task datum from the input manifest, before it gets mapped into the Liquid HTML template for the task UI.

Therefore (although I'm not super deep on this Comprehend error in particular), I expect it's your second `AccessDeniedException` that's actually the root cause - and the missing `output.manifest` is just a reflection that the labelling job failed?

I'd suggest to double-check that your `AmazonSageMaker-ExecutionRole-...` has permissions to `lambda:InvokeFunction` on your given function (I see AmazonSageMakerFullAccess only grants it on a few name patterns including e.g. `*SageMaker*`, `*LabelingFunction*`) - and that your Lambda's [resource-based policy](https://docs.aws.amazon.com/lambda/latest/dg/access-control-resource-based.html) doesn't have any restrictions preventing it being called by SageMaker/Comprehend (I'm not immediately sure which?)

Some other useful resources:
- [Add required permissions to use AWS Lambda with Ground Truth](https://docs.aws.amazon.com/sagemaker/latest/dg/sms-custom-templates-step3-lambda-permissions.html) (from SM Ground Truth developer guide)
- The [structured annotation tools repo on GitHub](https://github.com/aws-samples/amazon-comprehend-semi-structured-documents-annotation-tools)

(`intermediate` outputs are typically created by SM Ground Truth during the job before later consolidation into the `output` manifest)

Comprehend/Groundtruth PDF labeling job creation fails due to folder structure for manifest file (?)

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