AWS Polly MaxLexiconsExceededException

The maximum number of lexicons has been exceeded.

Resolving MaxLexiconsExceededException in AWS Polly

Understanding AWS Polly

AWS Polly is a 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 that require voice synthesis, such as virtual assistants, e-learning platforms, and automated customer service systems.

Identifying the Symptom

When using AWS Polly, you might encounter the MaxLexiconsExceededException. This error typically manifests when you attempt to use more lexicons than the service allows. Lexicons in AWS Polly are used to customize the pronunciation of words, which is particularly useful for brand names, acronyms, or other specialized terms.

Exploring the Issue

The MaxLexiconsExceededException error indicates that the number of lexicons you are trying to use has surpassed the limit set by AWS. Each AWS account has a default limit on the number of lexicons that can be created, and exceeding this limit triggers the exception.

Why This Happens

This issue arises when the total number of lexicons in your AWS account exceeds the maximum allowed. This could be due to the accumulation of unused or outdated lexicons over time.

Steps to Fix the Issue

To resolve the MaxLexiconsExceededException, you can either delete unused lexicons or request an increase in the lexicon limit from AWS. Here’s how you can do it:

Deleting Unused Lexicons

  1. Log in to your AWS Management Console.
  2. Navigate to the AWS Polly Dashboard.
  3. In the left-hand menu, click on Lexicons.
  4. Review the list of lexicons and identify any that are no longer needed.
  5. Select the lexicons you wish to delete and click on the Delete button.

Requesting an Increase in Lexicon Limit

  1. Go to the AWS Support Center.
  2. Click on Create Case.
  3. Select Service Limit Increase as the case type.
  4. Fill out the form, specifying the service as AWS Polly and the resource type as Lexicons.
  5. Submit the request and wait for AWS to process your case.

Conclusion

By managing your lexicons effectively and requesting limit increases when necessary, you can avoid the MaxLexiconsExceededException and ensure smooth operation of your AWS Polly applications. For more detailed information, you can refer to the AWS Polly Documentation.

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