Getting "EndpointDisabled" from Amazon SNS

Question

I'm using Amazon SNS. Notifications work well, but sometimes I get this error:

{
    "message": "Endpoint is disabled",
    "code": "EndpointDisabled",
    "name": "EndpointDisabled",
    "statusCode": 400,
    "retryable": false
}

Maybe you know why.

Answer 1

You can create a new SNS topic such as push-notification-failures and then associate your APNS/APNS_SANDBOX applications' "Delivery Failures" event to it. Subscribe to the event via email (and confirm) and you'll get useful debugging information about failures. This can all be accomplished through the SNS console and doesn't require API calls to perform.

It is probably worth it to subscribe an HTTP endpoint to this SNS topic and record all delivery failures so you have historical data to work from and debug production issues.

For example a delivery FailureMessage of "Platform token associated with the endpoint is not valid" means that you're sending a message from APNS_SANDBOX to an APNS registered device or vice versa. This can mean that you have the wrong APNS settings for your build system. (We have a frustrating problem of developer built binaries using APNS_SANDBOX vs. TestFlight built binaries using APNS for local testing and QA which is what led me down this path.)