AWS SQS AWS.SimpleQueueService.NonExistentQueue error encountered when attempting to access a queue.

The specified queue does not exist.

Understanding AWS SQS

Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables you to decouple and scale microservices, distributed systems, and serverless applications. SQS eliminates the complexity and overhead associated with managing and operating message-oriented middleware, and empowers developers to focus on differentiating work.

Identifying the Symptom

When working with AWS SQS, you might encounter the error code AWS.SimpleQueueService.NonExistentQueue. This error indicates that the queue you are trying to access does not exist.

Common Scenarios

  • Attempting to send or receive messages from a queue that has been deleted.
  • Using an incorrect queue URL or name.
  • Accessing a queue in the wrong AWS region.

Details About the Issue

The AWS.SimpleQueueService.NonExistentQueue error is thrown when the specified queue cannot be found. This often happens due to incorrect queue URLs or region mismatches. Each SQS queue is uniquely identified by its URL, which includes the region and account ID.

Understanding Queue URLs

Queue URLs have the following format: https://sqs..amazonaws.com//. Ensure that the URL is correctly formatted and points to the intended queue.

Steps to Fix the Issue

To resolve the AWS.SimpleQueueService.NonExistentQueue error, follow these steps:

1. Verify the Queue URL

Double-check the queue URL you are using in your application. Ensure that it matches the format and points to the correct queue. You can list your queues using the AWS CLI:

aws sqs list-queues --region

This command will return a list of all queue URLs in the specified region.

2. Check the AWS Region

Ensure that your application is configured to use the correct AWS region. The region should match the one where your queue is created. You can set the region in your AWS CLI configuration or specify it in your SDK initialization.

3. Confirm Queue Existence

If you suspect the queue might have been deleted, recreate it using the AWS Management Console or AWS CLI:

aws sqs create-queue --queue-name --region

Additional Resources

For more information on managing SQS queues, refer to the AWS SQS Developer Guide. If you need further assistance, consider reaching out to AWS Support.

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