Outbound Endpoints

The following outbound endpoints have many similar configuration options. Starting with version 5.2, the confirm-timeout has been added. Normally, when publisher confirms are enabled, the broker will quickly return an ack (or nack) which will be sent to the appropriate channel. If a channel is closed before the confirm is received, the Spring AMQP framework will synthesize a nack. "Missing" acks should never occur but, if you set this property, the endpoint will periodically check for them and synthesize a nack if the time elapses without a confirm being received.spring-doc.cn