AWS Polly InvalidSnsRegionException

The specified SNS region is not valid.

Understanding AWS Polly

AWS Polly is a cloud-based service provided by Amazon Web Services that converts text into lifelike speech. It enables developers to create applications that can 'speak' in a variety of languages and voices, enhancing user interaction and accessibility. AWS Polly is widely used in applications ranging from newsreaders to e-learning platforms.

Identifying the Symptom

When using AWS Polly, you might encounter the error InvalidSnsRegionException. This error typically arises when there is an issue with the specified SNS (Simple Notification Service) region. The error message might look something like this:

InvalidSnsRegionException: The specified SNS region is not valid.

Understanding the Issue

The InvalidSnsRegionException occurs when the SNS topic you are trying to use is located in a region that is not valid or not supported by AWS Polly. This can happen if there is a mismatch between the region specified in your AWS Polly configuration and the actual region of the SNS topic.

Common Causes

  • Incorrect region specified in the AWS Polly configuration.
  • SNS topic created in a region not supported by AWS Polly.

Steps to Fix the Issue

To resolve the InvalidSnsRegionException, follow these steps:

Step 1: Verify SNS Region

Ensure that the SNS topic is created in a region that is supported by AWS Polly. You can check the list of supported regions in the AWS Regional Services List.

Step 2: Update AWS Polly Configuration

Update your AWS Polly configuration to match the region of your SNS topic. This can be done by setting the correct region in your AWS SDK configuration. For example, in Python, you can set the region as follows:

import boto3

polly_client = boto3.Session(
region_name='us-west-2' # Replace with your SNS topic's region
).client('polly')

Step 3: Test the Configuration

After updating the configuration, test your application to ensure that the error is resolved. If the issue persists, double-check the region settings and ensure that your SNS topic is correctly configured.

Additional Resources

For more information on AWS Polly and SNS, you can refer to the following resources:

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