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AWS Polly SynthesisTaskNotFoundException

The specified synthesis task ID does not exist.

Understanding AWS Polly

AWS Polly is a cloud service provided by Amazon Web Services that converts text into lifelike speech. It allows developers to create applications that can talk, making it a valuable tool for enhancing user interaction through voice. Polly supports a wide range of languages and offers various voices, making it versatile for different applications.

Identifying the Symptom

When working with AWS Polly, you might encounter the error SynthesisTaskNotFoundException. This error typically occurs when you attempt to retrieve or manage a synthesis task using an ID that Polly cannot find. The symptom is usually an error message indicating that the specified synthesis task ID does not exist.

Explaining the Issue

The SynthesisTaskNotFoundException error is triggered when the AWS Polly service cannot locate the synthesis task associated with the provided ID. This can happen if the task ID is incorrect, has been deleted, or never existed. Understanding the context of this error is crucial for resolving it efficiently.

Common Causes

  • Incorrect task ID: The ID provided might have typographical errors or be incomplete.
  • Task deletion: The task might have been deleted after completion or due to cleanup processes.
  • Non-existent task: The task ID might refer to a task that was never created.

Steps to Resolve the Issue

To resolve the SynthesisTaskNotFoundException, follow these steps:

1. Verify the Task ID

Ensure that the task ID you are using is correct. Double-check for any typographical errors or missing characters. You can retrieve the correct task ID from your AWS Management Console or through the AWS CLI.

2. Check Task Existence

Use the AWS CLI to list all synthesis tasks and verify if the task ID exists:

aws polly list-speech-synthesis-tasks

This command will display all tasks, allowing you to confirm the presence of the task ID in question.

3. Review Task Status

If the task ID exists, check its status to ensure it has not been deleted or completed:

aws polly get-speech-synthesis-task --task-id <your-task-id>

This command will provide details about the task, including its current status.

4. Recreate the Task

If the task ID is incorrect or the task has been deleted, consider recreating the synthesis task with the correct parameters. Refer to the AWS Polly API documentation for guidance on creating synthesis tasks.

Additional Resources

For more information on managing synthesis tasks and troubleshooting AWS Polly, visit the AWS Polly Developer Guide and the AWS Polly Product Page.

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