Question

我将Spring Boot应用程序配置为连接到本地RabbitMQ代理。我还配置了FixedBackOff策略，以便在3次尝试失败后停止重试连接。

编辑1：我对FixedBackOff进行了以下配置，正如@ {gary-russell在here中所解释的那样：

@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;
}

通过这种配置，我不断在控制台中获得ConnectionException：

2018-04-16 13:48:29.769  WARN 54952 --- [nfoReplicator-0] o.s.b.a.health.RabbitHealthIndicator     : Health check failed

org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused
    at org.springframework.amqp.rabbit.support.RabbitExceptionTranslator.convertRabbitAccessException(RabbitExceptionTranslator.java:62)
    at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:368)
    at org.springframework.amqp.rabbit.connection.CachingConnectionFactory.createConnection(CachingConnectionFactory.java:573)
    at org.springframework.amqp.rabbit.core.RabbitTemplate.doExecute(RabbitTemplate.java:1430)
    at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1411)
    at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1387)
    at org.springframework.boot.actuate.health.RabbitHealthIndicator.getVersion(RabbitHealthIndicator.java:49)
    at org.springframework.boot.actuate.health.RabbitHealthIndicator.doHealthCheck(RabbitHealthIndicator.java:45)
    at org.springframework.boot.actuate.health.AbstractHealthIndicator.health(AbstractHealthIndicator.java:43)
    at org.springframework.boot.actuate.health.CompositeHealthIndicator.health(CompositeHealthIndicator.java:68)
    at org.springframework.cloud.netflix.eureka.EurekaHealthCheckHandler.getHealthStatus(EurekaHealthCheckHandler.java:103)
    at org.springframework.cloud.netflix.eureka.EurekaHealthCheckHandler.getStatus(EurekaHealthCheckHandler.java:99)
    at com.netflix.discovery.DiscoveryClient.refreshInstanceInfo(DiscoveryClient.java:1362)
    at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:100)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at com.rabbitmq.client.impl.SocketFrameHandlerFactory.create(SocketFrameHandlerFactory.java:50)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:907)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:859)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:799)
    at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:352)
    ... 19 common frames omitted

因此，应用程序不会上升并继续打印此异常。即使经纪人关闭，我怎样才能启动这个应用程序？

Answer 1

SimpleRabbitListenerContainerFactoryConfigurer与日志中的内容无关。

容器大概是@RabbitListener - 甚至是驱动消费者，但是在这里你有RabbitHealthIndicator使用已经RabbitTemplate并且它是被动呼叫，因此不会应用任何重试这里。好吧，您可以通过spring.rabbitmq.template.retry配置属性配置一些重试，但这不会帮助您保持UP与该健康指标同时您真正DOWN。

Answer 2

我是这样的：

@Configuration
@EnableRabbit
public class AmqpConfiguration {

    @Bean
    public SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory(ConnectionFactory connectionFactory) {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factory.setConnectionFactory(connectionFactory);
        ExponentialBackOff recoveryBackOff = new ExponentialBackOff();
        factory.setRecoveryBackOff(recoveryBackOff);
        return factory;
    }
}

使用BackOffExponencial类，您的服务器将检查RabbitMq是否在线。此服务将签入指数时间，并且永远不会停止。

示例：

尝试10次，顺序如下：

请求＃...后退

1 ................. 2000

2 ................. 3000

3 ................... 4500

4 ................. 6750

5 ................. 10125

6 ................. 15187

7 ................. 22780

8 ................. 30000

9 ................. 30000

10 ................. 30000

RabbitMQ Spring Boot应用程序处理代理下来

2 个答案: