Posted On: Nov 15, 2019
You can now set a dead-letter queue (DLQ) to an HAQM Simple Notification Service (SNS) subscription to capture undeliverable messages. HAQM SNS DLQs make your application more resilient and durable by storing messages in case your subscription endpoint becomes unreachable.
HAQM SNS DLQs are standard HAQM SQS queues. To receive notifications when undeliverable messages are moved to a DLQ, you can set up HAQM CloudWatch alarms. You can also analyze HAQM CloudWatch logs to troubleshoot message delivery failures more effectively.
HAQM SNS DLQs are available now in all commercial AWS Regions. You are charged for HAQM SNS data transfer and HAQM SQS requests for using DLQs. For pricing details, see HAQM SNS pricing and HAQM SQS pricing.
HAQM SNS is a fully managed pub/sub messaging service. You can use HAQM SNS topics to decouple message publishers and subscribers, and simultaneously distribute messages to multiple endpoints, such as HAQM SQS queues, AWS Lambda functions, HTTP endpoints, email addresses, and mobile devices (SMS text messages and mobile push notifications).
To learn more about HAQM SNS dead-letter queues, see the following:
- Designing Durable Serverless Apps with DLQs for HAQM SNS, HAQM SQS, AWS Lambda blog post
- HAQM SNS Dead-Letter Queues and Message Delivery Retries in the HAQM SNS Developer Guide
- Configuring an HAQM SNS Dead-Letter Queue for a Subscription tutorial
- SetSubscriptionAttributes, GetSubscriptionAttributes, and Subscribe API actions in the HAQM SNS API reference