@Override public void onSuccess(SendResult sendResult) {
                    if (sendResult.getSendStatus() != SendStatus.SEND_OK) {
                        log.error("Consumer replies message failed. SendStatus: {}", sendResult.getSendStatus());
                    } else {
                        log.debug("Consumer replies message success.");
                    }
                }
Message consume retry strategy in concurrently mode.

-1,no retry,put into DLQ directly
0,broker control retry frequency
>0,client control retry frequency
rocketmq-spring-boot/src/main/java/org/apache/rocketmq/spring/support/DefaultRocketMQListenerContainer.java