Question

我使用Java boot 1.4.0和'spring-boot-starter-amqp'连接到rabbitMq。消息生产者，消费者和rabbitMq服务器都在我的控制之下。生产中的几个月工作正常。但突然之间，我的消费者因下面给出的例外情因为我只生成始终有效的消息，所以我不知道出了什么问题。

但这导致我的侦听器容器关闭。因此我的消息处理已停止。我不得不手动重新启动消息使用者程序。

所以我的问题是：

我们可以避免在任何意外情况下完全关闭侦听器容器吗？
是否可以优雅地丢弃此类消息并使侦听器容器保持活动状态？
如果没有，那么有什么办法可以检查我的所有听众容器是否都在运行并且如果我发现它们已经死了就启动它们？（注意：我查看了RabbitListenerEndpointRegistry.getListenerContainers（）。但看起来它没有涵盖SimpleMessageListenerContainer容器。）

异常日志：

2017-02-20 12:42:18.441 ERROR 18014 --- [writeToDBQQueueListenerContainer-17] o.s.a.r.l.SimpleMessageListenerContainer : Consumer thread error, thread abort.
java.lang.NoClassDefFoundError: org/springframework/messaging/handler/annotation/support/MethodArgumentNotValidException
    at org.springframework.amqp.rabbit.listener.ConditionalRejectingErrorHandler$DefaultExceptionStrategy.causeIsFatal(ConditionalRejectingErrorHandler.java:110) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at org.springframework.amqp.rabbit.listener.ConditionalRejectingErrorHandler$DefaultExceptionStrategy.isFatal(ConditionalRejectingErrorHandler.java:97) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at org.springframework.amqp.rabbit.listener.ConditionalRejectingErrorHandler.handleError(ConditionalRejectingErrorHandler.java:72) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeErrorHandler(AbstractMessageListenerContainer.java:625) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.handleListenerException(AbstractMessageListenerContainer.java:852) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:685) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1165) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1149) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1100(SimpleMessageListenerContainer.java:95) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1312) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]
Caused by: java.lang.ClassNotFoundException: org.springframework.messaging.handler.annotation.support.MethodArgumentNotValidException
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_91]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_91]
    at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:89) ~[KattaQueueManager-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_91]
    ... 11 common frames omitted

还有一个例外：

2017-02-20 12:42:18.674 ERROR 18014 --- [imageQueueListenerContainer-53] o.s.a.r.l.SimpleMessageListenerContainer : Consumer thread error, thread abort.

java.lang.NoClassDefFoundError: com/rabbitmq/utility/Utility
        at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.checkShutdown(BlockingQueueConsumer.java:348) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
        at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.nextMessage(BlockingQueueConsumer.java:402) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1160) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1149) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1100(SimpleMessageListenerContainer.java:95) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1312) ~[spring-rabbit-1.6.1.RELEASE.jar!/:na]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]
Caused by: java.lang.ClassNotFoundException: com.rabbitmq.utility.Utility
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_91]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_91]
        at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:89) ~[KattaQueueManager-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_91]
        ... 7 common frames omitted

2017-02-20 12:42:18.675 ERROR 18014 --- [imageQueueListenerContainer-53] o.s.a.r.l.SimpleMessageListenerContainer : Stopping container from aborted consumer

我的消费者示例代码：

@Bean
public MessageConverter jsonMessageConverter(){
    //return new JsonMessageConverter();
    Jackson2JsonMessageConverter converter =  new   Jackson2JsonMessageConverter();

    converter.setClassMapper(new ClassMapper() {
        @Override
        public Class<?> toClass(MessageProperties properties) {
            return String.class;
        }

        @Override
        public void fromClass(Class<?> clazz, MessageProperties properties) {
        }
    });

    return converter;
}

@Bean
public ConnectionFactory connectionFactory() 
{
    CachingConnectionFactory connectionFactory =
            new CachingConnectionFactory(_rabbitmqHost, _rabbitmqPort);
    return connectionFactory;
}

@Bean
public RabbitTemplate rabbitTemplate() 
{
    RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory());
    rabbitTemplate.setMessageConverter(jsonMessageConverter());
    return rabbitTemplate;
}

@Bean
TopicExchange exchange() 
{
    return new TopicExchange("MyExchange");
}

@Bean
public Queue mainQueue() 
{
    return new Queue("MyMainQ");
}

@Bean
public Binding mainRouteBinding() 
{
    return BindingBuilder.bind(mainQueue()).to(exchange()).with("MyMainQ");
}

@Bean
SimpleMessageListenerContainer mainQueueListenerContainer(
        ConnectionFactory connectionFactory, 
        @Qualifier("mainQueueListenerAdapter") MessageListenerAdapter listenerAdapter) 
{
    SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
    container.setConnectionFactory(connectionFactory);
    container.setQueues(mainQueue());

    container.setMessageConverter(jsonMessageConverter());

    container.setMessageListener(listenerAdapter);
    container.setConcurrentConsumers(1);
    return container;
}

@Bean
MessageListenerAdapter mainQueueListenerAdapter(MainConsumer receiver) 
{
    MessageListenerAdapter msgAdapter = new MessageListenerAdapter(receiver, "receiveMessage");

    msgAdapter.setMessageConverter(jsonMessageConverter());

    return msgAdapter;
}

@Bean
MainConsumer getMainConsumer()
{
    return new MainConsumer();
}

//
//The receiving method in MainConsumer class looks as given below
public void receiveMessage(String message) 
{
     // My business logic goes here ...
}

如果出现意外错误，如何避免关闭SimpleMessageListenerContainer？

0 个答案: