通过 IP 地址而不是 localhost 连接到 RabbitMQ 时连接被拒绝

Question

I'm trying to set up a RabbitMQ server (version 3.7.4, installed via homebrew on macOS 10.13.4) such that my colleagues can work with it via the internal network. We are using the official Java client ( com.rabbitmq:amqp-client:5.2.0 ). Unfortunately, they only get a ConnectException with the message Connection refused :

java.net.ConnectException: Connection refused (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:60)
    at com.rabbitmq.client.impl.recovery.RecoveryAwareAMQConnectionFactory.newConnection(RecoveryAwareAMQConnectionFactory.java:62)
    at com.rabbitmq.client.impl.recovery.AutorecoveringConnection.init(AutorecoveringConnection.java:134)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:997)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:956)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:914)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1068)
    at my.own.private.RabbitMqConnector.connect(RabbitMqConnector.java:29)

We already set up another user account (not guest ) which has admin privileges. With almost the same Java code I can connect locally (setting the host to localhost ) but not if I use my IP address. According to the RabbitMQ docs, the RabbitMQ server binds to all network interfaces by default (otherwise I would have said that it's a problem with address binding). I disabled my firewall so that shouldn't be the problem.

Here's the respective code:

final ConnectionFactory connectionFactory = new ConnectionFactory();
connectionFactory.setUsername("username");
connectionFactory.setPassword("password");
connectionFactory.setHost("10.10.33.12");
connectionFactory.setPort(5672);
connectionFactory.setVirtualHost("/");

try (final Connection connection = connectionFactory.newConnection()) {
    // doo stuff with the connection
}

Answer 1

I finally found the actual problem and it's not related to Java or how I configured the ConnectionFactory . It was indeed a problem how the RabbitMQ package for homebrew is configured. In the rabbitmq-env.conf file, there was the following setting

NODE_IP_ADDRESS=127.0.0.1

This setting caused RabbitMQ to only listen on 127.0.0.1 for incoming connections. Once I removed the setting and restarted the service, I could connect from other machines as well.

Thank you all for your help!

Answer 2

The issue is not with your code. I would suggest you to check such things:

• RabbitMQ Server is up and running
• Your custom user can access virtual host "/"
• Check firewall settings if any, probably it's refusing connection with remote host

One of these should be the cause, hope it helps!