Can't enable rabbitmq-management plugin on Windows 7

Question

I had installed Erlang and RabbitMQ. After I started RabbitMQ service. All those step were done without errors. But when I ran: C:...\rabbitmq-server-3.5.6\sbin>rabbitmq-plugins.bat enable rabbitmq_management I got following error:

Applying plugin configuration to rabbit@AZE-PC05478... failed. * Could not contact node rabbit@AZE-PC05478. Changes will take effect at broker restart. * Options: --online - fail if broker cannot be contacted. --offline - do not try to contact broker.

I copied .erlang.cookie from /Windows to C:. But I still have the same result. Is anything I missed? Thank you for help.

More infos: When I added : rabbitmqctl.bat status. I got:

Status of node 'rabbit@AZE-PC05478'
Error: unable to connect to node 'rabbit@AZE-PC05478': nodedown

DIAGNOSTICS
===========

attempted to contact: ['rabbit@AZE-PC05478']

rabbit@AZE-PC05478:
  * connected to epmd (port 4369) on AZE-PC05478
  * epmd reports node 'rabbit' running on port 25672
  * TCP connection succeeded but Erlang distribution failed

  * Authentication failed (rejected by the remote node), please check the Erlang cookie

current node details:
- node name: 'rabbitmq-cli-74@AZE-PC05478'
- home dir: C:\
- cookie hash: 1jjD3t2FUFyx/xXyPe0s4w==

Answer 1

On Windows, RabbitMQ had issues with hostnames being reported sometimes in lowercase, sometimes in uppercase, and this doesn't play well with Erlang distribution.

It was fixed in RabbitMQ 3.6.0: https://github.com/rabbitmq/rabbitmq-server/commit/1fb451090a2557f35a2800f9d04c476ff1ad6a22

I suppose you're hitting this problem, because the output of rabbitmqctl shows that RabbitMQ is running:

epmd reports node 'rabbit' running on port 25672

It's just that rabbitmqctl fails to contact it. You can check this by specifying the lowercase version of your node name on rabbitmqctl command line:

rabbitmqctl -n rabbit@aze-pc05478 status