[rabbitmq-discuss] Cluster not running - getting Error: {cannot_discover_cluster, "The nodes provided are either offline or not running" error

[Tim Watson]

Hi,

On 28 Feb 2013, at 15:40, shankaralingegowda Singonahalli Chikkarevanna wrote:
> and I have enabled ssh entry for both master and slave
> slave can access master using ssh master
> 

Enabling ssh has nothing to do with clustering, so I'm not sure why that's relevant. Are you trying to provide connectivity using ssh tunnels or something? 

> after that I stopped rabbitmq slave machine
> and run join cluster command like join_cluster rabbitmq at master    ---{here rabbitmq is master setup user name and I{p)
> 
> but getting
> Error: {cannot_discover_cluster,"The nodes provided are either offline or not running"
> error

This error means that Erlang cannot connect to the rabbitmq at master node. The individual nodes need to be able to contact one another over TCP/IP using port 4369 and both hosts need to be able to resolve the other's hostname via dns. You should be able to `ping master` from slave and vice versa. If you can ping from one machine to another, you should also be able to telnet to the epmd port (4369) successfully.

> please help me to resolve the issue
> 

Please confirm that TCP/IP connectivity between the two machines works over port 4369. If this *does* work then please confirm that both machines have been configured with the same erlang cookie. If you've followed the transcript at http://www.rabbitmq.com/clustering.html and are still unable to get join_cluster working then let me know and I'll try to assist you further.

Cheers,
Tim