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AWS Polly InvalidS3KeyException

The specified S3 key is not valid.

Understanding AWS Polly and Its Purpose

AWS Polly is a service provided by Amazon Web Services that turns text into lifelike speech, allowing developers to create applications that can 'speak'. It is widely used in applications that require voice interaction, such as virtual assistants, automated customer service, and more.

Recognizing the Symptom: InvalidS3KeyException

When using AWS Polly, you might encounter the error InvalidS3KeyException. This error typically manifests when attempting to store or retrieve audio files from an Amazon S3 bucket, and it indicates that the specified S3 key is not valid.

Exploring the Issue: What Causes InvalidS3KeyException?

The InvalidS3KeyException is thrown when the S3 key you have provided does not conform to the expected format or contains errors. This could be due to typos, incorrect paths, or invalid characters in the key name.

Common Mistakes Leading to Invalid S3 Keys

  • Using unsupported characters in the S3 key.
  • Incorrectly formatted paths, such as missing slashes.
  • Typographical errors in the key name.

Steps to Resolve InvalidS3KeyException

To resolve this issue, follow these steps:

Step 1: Verify the S3 Key

Ensure that the S3 key you are using is correct. Double-check for any typographical errors or unsupported characters. Refer to the AWS S3 Object Key Naming Guidelines for more information.

Step 2: Check the S3 Path Format

Ensure that the path format is correct. For example, if your key is supposed to be in a folder, make sure it includes the correct slashes (e.g., foldername/filename.mp3).

Step 3: Use AWS CLI for Verification

Use the AWS CLI to list the objects in your bucket and verify the key. Run the following command:

aws s3 ls s3://your-bucket-name/ --recursive

This command will list all objects in the bucket, allowing you to verify the correct key.

Step 4: Update Your Application Code

If the key is incorrect, update your application code to use the correct key. Ensure that any dynamic generation of keys is properly handled.

Conclusion

By following these steps, you can resolve the InvalidS3KeyException and ensure that your AWS Polly application functions smoothly. For further assistance, refer to the AWS Polly Documentation or reach out to AWS Support.

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