[rabbitmq-discuss] .erlang.cookie wont change for clustering

Tim Watson tim at rabbitmq.com
Tue Oct 2 19:35:18 BST 2012

Perhaps my response didn't make sense, or you're only checking the google group, which is a bad idea as it's not an official one.

You *already have* a rabbit running - that's what the error message means. So you need to shut this down and restart it, at which point the new cookie will get picked up. `rabbitmqctl stop` first and then start rabbit using whatever mechanism you've used to start it in the past.


On 2 Oct 2012, at 17:06, Orion Fillmore wrote:

> Sorry I forgot to post my specs.
> Box - Ubuntu 12.04
> Rabbit - RabbitMQ 2.7.1
> Admin - helpless:)
> On Tuesday, October 2, 2012 9:32:51 AM UTC-5, Orion Fillmore wrote:
> Hello,
> I am trying to get clustering set up for some rabbit mq servers.  I changed the .erlang.cookie file on my slave to match the .erlang.cookie file on my master.   I restarted rabbitmq...even tried a total system reboot, but when i do this:
>  rabbitmq-server -detached
> I get this
> Activating RabbitMQ plugins ...
> 0 plugins activated:
> node with name "rabbit" already running on "ip-xx-xx-xxx-xxx"
> diagnostics:
> - nodes and their ports on ip-xx-xx-xxx-xxx: [{rabbit,52647},
>                                               {rabbitmqprelaunch13762,39547}]
> - current node: 'rabbitmqprelaunch13762 at ip-xx-xx-xxx-xxx
> - current node home dir: /var/lib/rabbitmq
> - current node cookie hash: z+T5xm6diKG0nxAxdGqbVA==
> But that is the old cookie hash, not the new one and I cannot get the clustering to work as a result.  Any ideas what I am doing wrong and/or need to do?
> Thanks in advance everyone!
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