[rabbitmq-discuss] newbie problem--'Error: unable to connect to node 'rabbit at rabbitmq-small02-dev': nodedown'

Emile Joubert emile at rabbitmq.com
Fri Mar 16 22:03:10 GMT 2012

Hi John,

On 16/03/12 21:26, John Stoner wrote:
>     [jstoner at rabbitmq-small02-dev]> sudo rabbitmqctl cluster
>     rabbit at rabbitmq-small01-dev
>     Clustering node 'rabbit at rabbitmq-small02-dev' with
>     ['rabbit at rabbitmq-small01-dev'] ...
>     Error: {no_running_cluster_nodes,['rabbit at rabbitmq-small01-dev'],
>                                      ['rabbit at rabbitmq-small01-dev']}

Does the RabbitMQ logfile on rabbitmq-small01-dev contain an entry about
a connection attempt from a disallowed node? If it doesn't then
internode network traffic is probably being blocked by a firewall.

>     [
>                     {kernel,
>                             [{inet_dist_listen_min, [some number]},
>                              {inet_dist_listen_max, [another number]}]
>                     }
>     ].

You can confirm whether that has taken effect by checking the port
numbers returned by "epmd -names".

> seeing traffic on 4369, but not the other ports.

If you don't see other internode traffic on the configured port(s) then
then the firewall config needs to be updated.

I suggest independently testing the firewall config with another
application such as netcat to get some confidence that it is correct.
Alternatively temporarily eliminate the firewall entirely for debugging
purposes if possible.


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