Spring AMQP message resiliency in case broker connectivity down - rabbitmq

Question

I have a Use Case of managing Spring AMQP client message resiliency in case of RabbitMQ server connectivity down,
For the same I have used Spring Retry
RabbitTemplate template = // get template from some bean
RetryTemplate retryTemplate = new RetryTemplate();
ExponentialBackOffPolicy backOffPolicy = new ExponentialBackOffPolicy();
// 10 sec
backOffPolicy.setInitialInterval(10000);
// 1 hr
backOffPolicy.setMultiplier(360.0);
// 1 hr max interval
backOffPolicy.setMaxInterval(3600001);
retryTemplate.setBackOffPolicy(backOffPolicy);
template.setRetryTemplate(retryTemplate);
template.convertAndSend("Direct-Exchange",
"Test.Routing.Key", AMQPMessage);
But when a try to test it and bring broker down it hangs at template.convertAndSend() and never recovers even when RabbitMQ broker connectivity is restored

Answer 1

Your retry configuration is rather extreme. Did you wait for an hour?
It works fine for me...
#SpringBootApplication
public class So44300651Application implements CommandLineRunner {
public static void main(String[] args) {
SpringApplication.run(So44300651Application.class, args).close();
}
#Autowired
private RabbitTemplate template;
#Override
public void run(String... args) throws Exception {
template.convertAndSend("foo");
}
#Bean
public RabbitTemplate template(ConnectionFactory cf) {
RabbitTemplate template = new RabbitTemplate(cf);
RetryTemplate retry = new RetryTemplate();
ExponentialBackOffPolicy backOff = new ExponentialBackOffPolicy();
backOff.setInitialInterval(10_000);
backOff.setMultiplier(1.5);
backOff.setMaxInterval(15_000);
retry.setBackOffPolicy(backOff);
template.setRetryTemplate(retry);
return template;
}
}
Result:
09:19:45.592 [main] DEBUG o.s.retry.support.RetryTemplate - Retry: count=0
09:19:45.603 [main] DEBUG o.s.r.b.ExponentialBackOffPolicy - Sleeping for 10000
09:19:55.607 [main] DEBUG o.s.retry.support.RetryTemplate - Checking for rethrow: count=1
09:19:55.607 [main] DEBUG o.s.retry.support.RetryTemplate - Retry: count=1
09:19:55.608 [main] DEBUG o.s.r.b.ExponentialBackOffPolicy - Sleeping for 15000
09:20:10.610 [main] DEBUG o.s.retry.support.RetryTemplate - Checking for rethrow: count=2
09:20:10.610 [main] DEBUG o.s.retry.support.RetryTemplate - Retry: count=2
09:20:10.654 [main] INFO o.s.a.r.c.CachingConnectionFactory - Created new connection: SimpleConnection#13cf7d52 [delegate=amqp://guest#127.0.0.1:5672/, localPort= 56958]