我有一个使用异步使用者处理消息的应用程序(通过@RabbitListener)。在此消费者方法中,由于我已定义的策略,会发生异常并且消息会重新排队:
spring:
rabbitmq:
listener:
simple:
default-requeue-rejected: false
retry:
enabled: true
max-attempts: 10
initial-interval: 60000 # a minute
multiplier: 2
max-interval: 600000 # 10 minutes
consumer方法调用一个私有方法,该方法以递归方式从DB中提取数据并使用RabbitTemplate推送到队列中。我希望这个队列中有大约200条消息,但它会上升到大约700k,然后由于重试策略耗尽而导致消费者线程停止。
问题是我找不到任何记录异常的地方,因此我无法理解业务逻辑的哪个部分导致了这个问题。我可以尝试将整个函数放入try / catch块并记录问题,然后重新抛出它以进行Spring AMQP的异常处理,但我想知道是否存在更好的方法。
我的项目具有以下依赖项:
Spring Boot: 1.5.9.RELEASE
春季AMQP: 1.7.4.RELEASE
RabbitMQ: 3.7.2
答案 0 :(得分:0)
我们应该尝试让它更容易添加RetryListener
,但你现在可以通过更换重试拦截器来实现,如下所示......
@SpringBootApplication
public class So48331502Application {
private static final Logger logger = LoggerFactory.getLogger(So48331502Application.class);
public static void main(String[] args) {
SpringApplication.run(So48331502Application.class, args);
}
@Bean
public ApplicationRunner runner(RabbitListenerEndpointRegistry registry,
RabbitProperties properties, Advice interceptor) {
return args -> {
ListenerRetry retry = properties.getListener().getSimple().getRetry();
if (retry.isEnabled()) {
SimpleMessageListenerContainer container = (SimpleMessageListenerContainer) registry
.getListenerContainer("myListener");
container.setAdviceChain(interceptor);
}
registry.start();
};
}
@Bean
public StatelessRetryOperationsInterceptorFactoryBean interceptor(RabbitProperties properties) {
ListenerRetry retry = properties.getListener().getSimple().getRetry();
RetryTemplate retryTemplate = new RetryTemplate();
RetryPolicy retryPolicy = new SimpleRetryPolicy(retry.getMaxAttempts());
ExponentialBackOffPolicy backOffPolicy = new ExponentialBackOffPolicy();
backOffPolicy.setInitialInterval(retry.getInitialInterval());
backOffPolicy.setMultiplier(retry.getMultiplier());
backOffPolicy.setMaxInterval(retry.getMaxInterval());
retryTemplate.setRetryPolicy(retryPolicy);
retryTemplate.setBackOffPolicy(backOffPolicy);
retryTemplate.registerListener(
new RetryListener() {
@Override
public <T, E extends Throwable> boolean open(RetryContext context, RetryCallback<T, E> callback) {
return true;
}
@Override
public <T, E extends Throwable> void close(RetryContext context, RetryCallback<T, E> callback,
Throwable throwable) {
if (throwable != null) {
logger.info("Failed: Retry count " + context.getRetryCount(), throwable);
}
}
@Override
public <T, E extends Throwable> void onError(RetryContext context, RetryCallback<T, E> callback,
Throwable throwable) {
logger.info("Retry count " + context.getRetryCount(), throwable);
}
});
StatelessRetryOperationsInterceptorFactoryBean interceptor =
new StatelessRetryOperationsInterceptorFactoryBean();
interceptor.setRetryOperations(retryTemplate);
return interceptor;
}
@RabbitListener(id="myListener", queues = "one")
public void in(Object in) {
throw new RuntimeException();
}
}
请注意,您必须将auto-startup
设置为false,以便更改建议链...
spring:
rabbitmq:
listener:
simple:
auto-startup: 'false'
retry:
enabled: 'true'
然后启动注册表,它将启动所有容器。