我使用SimpleMessageListenerContainer作为远程AMQP的基础。只要在进程启动时可以访问RabbitMQ代理，一切都会顺利进行。但是，如果由于任何原因无法访问（网络故障，权限问题等），容器只会继续重试以永久连接。在这种情况下，如何设置重试行为（例如，在指数退避时最多尝试5次然后中止，从而终止进程）？我已经看过this了，但在集装箱启动时它似乎对我不起作用。谁能请一些亮点？
至少，我希望能够捕获异常并提供日志消息，而不是像默认行为一样打印异常本身。
答案 0 :(得分：4)
如何在这种情况下设置重试行为
没有复杂的连接重试，只是一个简单的recoveryInterval。假设经纪人不可用是暂时的。致命错误（例如证件错误）会阻止容器。
当您认为是时候放弃时，您可以使用一些外部流程来尝试connectionFactory.createConnection()和stop() SimpleMessageListenerContainer。
您也可以继承 < / p>
CachingConnectionFactory，覆盖createBareConnection捕获异常并增加recoveryInterval，然后在需要时调用stop()。
修改
从1.5开始，您现在可以配置backOff。这是一个使用Spring Boot的例子......
@SpringBootApplication
public class RabbitBackOffApplication {
public static void main(String[] args) {
SpringApplication.run(RabbitBackOffApplication.class, args);
}
@Bean(name = "rabbitListenerContainerFactory")
public SimpleRabbitListenerContainerFactory simpleRabbitListenerContainerFactory(
SimpleRabbitListenerContainerFactoryConfigurer configurer,
ConnectionFactory connectionFactory) {
SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
configurer.configure(factory, connectionFactory);
BackOff recoveryBackOff = new FixedBackOff(5000, 3);
factory.setRecoveryBackOff(recoveryBackOff);
return factory;
}
@RabbitListener(queues = "foo")
public void listen(String in) {
}
}
和
2018-04-16 12:08:35.730 INFO 84850 --- [ main] com.example.RabbitBackOffApplication : Started RabbitBackOffApplication in 0.844 seconds (JVM running for 1.297)
2018-04-16 12:08:40.788 WARN 84850 --- [cTaskExecutor-1] o.s.a.r.l.SimpleMessageListenerContainer : Consumer raised exception, processing can restart if the connection factory supports it. Exception summary: org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused (Connection refused)
2018-04-16 12:08:40.788 INFO 84850 --- [cTaskExecutor-1] o.s.a.r.l.SimpleMessageListenerContainer : Restarting Consumer@57abad67: tags=[{}], channel=null, acknowledgeMode=AUTO local queue size=0
2018-04-16 12:08:40.789 INFO 84850 --- [cTaskExecutor-2] o.s.a.r.c.CachingConnectionFactory : Attempting to connect to: [localhost:1234]
2018-04-16 12:08:45.851 WARN 84850 --- [cTaskExecutor-2] o.s.a.r.l.SimpleMessageListenerContainer : Consumer raised exception, processing can restart if the connection factory supports it. Exception summary: org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused (Connection refused)
2018-04-16 12:08:45.852 INFO 84850 --- [cTaskExecutor-2] o.s.a.r.l.SimpleMessageListenerContainer : Restarting Consumer@3479ea: tags=[{}], channel=null, acknowledgeMode=AUTO local queue size=0
2018-04-16 12:08:45.852 INFO 84850 --- [cTaskExecutor-3] o.s.a.r.c.CachingConnectionFactory : Attempting to connect to: [localhost:1234]
2018-04-16 12:08:50.935 WARN 84850 --- [cTaskExecutor-3] o.s.a.r.l.SimpleMessageListenerContainer : Consumer raised exception, processing can restart if the connection factory supports it. Exception summary: org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused (Connection refused)
2018-04-16 12:08:50.935 INFO 84850 --- [cTaskExecutor-3] o.s.a.r.l.SimpleMessageListenerContainer : Restarting Consumer@2be60f67: tags=[{}], channel=null, acknowledgeMode=AUTO local queue size=0
2018-04-16 12:08:50.936 INFO 84850 --- [cTaskExecutor-4] o.s.a.r.c.CachingConnectionFactory : Attempting to connect to: [localhost:1234]
2018-04-16 12:08:50.938 WARN 84850 --- [cTaskExecutor-4] o.s.a.r.l.SimpleMessageListenerContainer : stopping container - restart recovery attempts exhausted