GitHub user startjava added a comment to the discussion: How to achieve the
effect of maximum delay time in retransmission backoff mechanism
@codelipenghui
```
@RequestMapping("sendMessage5")
public String sendMessage5() throws PulsarClientException {
String messageValue = "我是消息";
producer3.send(messageValue);
return "成功生产5";
}
```
```
@Component
public class MyMessageListener2 implements MessageListener {
@Override
public void received(Consumer consumer, Message msg) {
String messageValue = new String(msg.getData());
messageValue = messageValue.split("\\_")[0];
System.out.println("timeList.add(\"" + System.currentTimeMillis() +
"\");");
consumer.negativeAcknowledge(msg);
}
}
```
```
@Bean
public Consumer createPulsarConsumer_myTopic2() throws
PulsarClientException {
Consumer consumer =
pulsarClient.newConsumer().topic(myTopic2).subscriptionName(myTopic2_subscriptionName).messageListener(myMessageListener2).subscriptionType(SubscriptionType.Shared).negativeAckRedeliveryBackoff(MultiplierRedeliveryBackoff.builder()
.minDelayMs(1000)
.maxDelayMs(60 * 1000)
.build()).subscribe();
return consumer;
}
```
run result the intervals are as follows:
1080
2389
4297
8500
16284
32255
60067
but doc url：
https://pulsar.apache.org/docs/concepts-messaging/#negative-acknowledgement
say +10s，but i run result no +10s，
i code wrong or doc wrong ??
thank you !
GitHub link:
https://github.com/apache/pulsar/discussions/18261#discussioncomment-4017738
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