Amazon SNS Binder Health

Health Status	Description
UP	Status indicating that the binder is functioning as expected.
UNKNOWN	Status indicating that the binder is in an unknown state. The binder will automatically recover when underlying connectivity issues are resolved. User intervention may be required.
RECONNECTING	Status indicating that the binder is trying to reconnect to the message broker.
DOWN	Status indicating that the binder is having difficulties reconnecting to the Amazon SNS service. The binder will automatically recover when underlying connectivity issues are resolved. User intervention may be required.

For details, see SNS Binder Health Indictor