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Amazon Simple Notification Service (SNS) is a fully managed messaging service provided by AWS. It is designed to coordinate the delivery of messages to subscribing endpoints or clients. SNS supports a variety of use cases, including application alerts, notifications, and mobile push notifications.
When using AWS SNS, you might encounter the MessageRejected error. This error indicates that the message you attempted to send was rejected by the endpoint. This can be frustrating, especially when you are unsure of the underlying cause.
The MessageRejected error typically occurs when the message format does not comply with the requirements of the endpoint. This can happen if the message contains unsupported characters, exceeds size limits, or violates other endpoint-specific constraints.
To resolve the MessageRejected error, follow these steps:
Ensure that your message format complies with the endpoint's requirements. Refer to the AWS SNS Message and JSON Formats documentation for guidance on the correct format.
Review your message content for any unsupported characters. Remove or replace these characters to ensure compatibility with the endpoint.
Ensure that your message does not exceed the size limits imposed by the endpoint. The maximum size for a message in SNS is 256 KB. If your message is larger, consider breaking it into smaller parts or compressing it.
Before sending your actual message, test with a sample message to verify that it is accepted by the endpoint. This can help identify any issues with the message format or content.
For more detailed information on troubleshooting SNS issues, visit the AWS SNS Troubleshooting Guide. Additionally, consider checking the AWS Knowledge Center for common solutions to SNS problems.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)