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创建了具有两个 rabbitMQ 节点的集群。rabbit1 和 rabbit2 节点的配置如下。

1> CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
connectionFactory.setAddresses("rabbit1:5672,rabbit2:5672");

2> 节点类型rabbit1 - 磁盘节点rabbit2 - ram 节点3> 生产者和消费者程序位于rabbit2 节点（即> ram 节点）

4> Producer sample code -
String QueueName = "Queue.";
for(int m=0; m<50000; m++){
    // send message
    System.out.println(this.rabbitTemplate.getConnectionFactory().getHost());
    this.rabbitTemplate.convertAndSend(m);
    /*Thread.sleep(100);*/
}

5> consumer code -
String QueueName = "Queue.";
public void run() {
    System.out.println("Consumer running host : " + this.connectionFactory.getHost());
    SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
    container.setConnectionFactory(this.connectionFactory);
    container.setQueueNames(this.queueName);
    container.setMessageListener(new MessageListenerAdapter(new TestMessageHandler(this.connectionFactory.getHost()), new JsonMessageConverter())); 
    container.start();
}

TestMessageHandler class sample code-

    public TestMessageHandler(String hostName){
        System.out.println("Host: " + hostName);
        this.hostName = hostName;
    }

    // Handle message
    public void handleMessage(int message) {
        System.out.println("handleMessage Host: " + this.hostName);
        System.out.println("Int : " + message);
    }

6> Each node executed below policy
cmd> rabbitmqctl set_policy ha-all "^Queue\." "{""ha-mode"":""all""}"

7> Started producer and consumer simultaneously. Could see host name as "rabbit1" then stopped "rabbit1" node with "rabbitmqctl stop_app" command to test fail-over scenario. Then got the below error

    WARN  [.listener.SimpleMessageListenerContainer]: Consumer raised exception, processing can restart if the connection factory supports it
    com.rabbitmq.client.ShutdownSignalException: connection error; reason: {#method<connection.close>(reply-code=541, reply-text=INTERNAL_ERROR, class-id=0, method-id=0), null, ""}
        at com.rabbitmq.client.impl.AMQConnection.startShutdown(AMQConnection.java:678)
        at com.rabbitmq.client.impl.AMQConnection.shutdown(AMQConnection.java:668)
        at com.rabbitmq.client.impl.AMQConnection.handleConnectionClose(AMQConnection.java:624)
        at com.rabbitmq.client.impl.AMQConnection.processControlCommand(AMQConnection.java:598)
        at com.rabbitmq.client.impl.AMQConnection$1.processAsync(AMQConnection.java:96)
        at com.rabbitmq.client.impl.AMQChannel.handleCompleteInboundCommand(AMQChannel.java:144)
        at com.rabbitmq.client.impl.AMQChannel.handleFrame(AMQChannel.java:91)
        at com.rabbitmq.client.impl.AMQConnection$MainLoop.run(AMQConnection.java:523)
    INFO  [.listener.SimpleMessageListenerContainer]: Restarting Consumer: tag=[amq.ctag-5CJ3YJYfMZDnJOnXsds6_Q], channel=Cached Rabbit Channel: AMQChannel(amqp://guest@192.168.97.70:5672/,1), acknowledgeMode=AUTO local queue size=0

after this warning, again am getting host name as "rabbit1" only. actually it should be "rabbit2" as per my understanding but its not happening.

    So, here are my Queries -

        1> Why am getting host name as "rabbit1" even after stopping?
        2> To test the fail-over do we require any load balancer?
        3> If my steps are wrong for testing fail-over case, please provide steps for the same?
        4> How to distribute queues/messages to particular node, as below, 1-500 messages/queues to node1, 501-1000 messages/queues to node2, etc.
        5> Please let me know is there any other approach to test fail-over scenario?

感谢您对此的任何帮助。

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