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AWS Polly InvalidSnsTopicException

The specified SNS topic is not valid or accessible.

Understanding AWS Polly

AWS Polly is a service provided by Amazon Web Services that turns 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. Polly is often used in applications such as newsreaders, e-learning platforms, and any other service that benefits from text-to-speech capabilities.

Recognizing the Symptom: InvalidSnsTopicException

When using AWS Polly, you might encounter the error InvalidSnsTopicException. This error typically arises when there is an issue with the SNS (Simple Notification Service) topic that Polly is trying to access or use. The symptom is usually an error message indicating that the SNS topic is invalid or inaccessible.

Common Observations

  • Failure to receive notifications from AWS Polly.
  • Error logs showing InvalidSnsTopicException.

Exploring the Issue: Invalid SNS Topic

The InvalidSnsTopicException error indicates that the SNS topic specified in your AWS Polly request is either incorrect or lacks the necessary permissions. SNS topics are used to send notifications, and if Polly cannot access the topic, it cannot send the required notifications.

Root Causes

  • The SNS topic name is incorrect or misspelled.
  • The SNS topic does not exist in the specified AWS region.
  • Insufficient permissions to access the SNS topic.

Steps to Resolve the InvalidSnsTopicException

To resolve this issue, follow these steps:

Verify SNS Topic Name

  1. Log in to the AWS Management Console.
  2. Navigate to the Amazon SNS Dashboard.
  3. Ensure that the SNS topic name specified in your Polly request matches exactly with the one listed in the SNS dashboard.

Check SNS Topic Permissions

  1. In the SNS dashboard, select the topic in question.
  2. Go to the Access Policy section.
  3. Ensure that the policy allows access from AWS Polly. You might need to add a policy statement that grants the necessary permissions.

Validate SNS Topic Region

  1. Ensure that the SNS topic is created in the same AWS region as your Polly service.
  2. If necessary, create a new SNS topic in the correct region and update your Polly request accordingly.

Conclusion

By following these steps, you should be able to resolve the InvalidSnsTopicException error in AWS Polly. Ensuring that your SNS topic is correctly named, accessible, and in the right region will help maintain smooth operation of your text-to-speech applications. For more detailed information, refer to the AWS Polly Documentation and the Amazon SNS Documentation.

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