CODEWITHSUNDEEP
rabbitmq
mrplainswalker
mrplainswalker

Reputation: 791

Can't connect RabbitMQ node to cluster

I've just installed rabbitmq on 2 new VMs and tried to create a simple two node cluster. I've copied the erlang cookie file from one machine to both locations on that machine (C:\Users{username} and C:\Windows\System32\config\systemprofile) and those locations on the other machine as well.

When I try to join one to the other to create a cluster using the rabbitmqctl join_cluster command, I get the following output:

Clustering node rabbit@{machinename1} with rabbit@{machinename2}
Error: unable to perform an operation on node 'rabbit@{machinename2}. Please see diagnostics information and suggestions below.

Most common reasons for this are:

 * Target node is unreachable (e.g. due to hostname resolution, TCP connection or firewall issues)
 * CLI tool fails to authenticate with the server (e.g. due to CLI tool's Erlang cookie not matching that of the server)
 * Target node is not running

In addition to the diagnostics info below:

 * See the CLI, clustering and networking guides on http://rabbitmq.com/documentation.html to learn more
 * Consult server logs on node rabbit@{machinename2}

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

attempted to contact: ['{machinename2}']

rabbit@{machinename2}:
  * connected to epmd (port 4369) on {machinename2}
  * epmd reports node 'rabbit' uses port 25672 for inter-node and CLI tool traffic
  * TCP connection succeeded but Erlang distribution failed

  * Hostname mismatch: node "rabbit@{machinename2}" believes its host is different. Please ensure that hostnames resolve the same way locally and on "rabbit@{machinename2}"


Current node details:
 * node name: 'rabbitmqcli60@{machinename1}'
 * effective user's home directory: {homedirectory}
 * Erlang cookie hash: {hash}

Everyone on the internet seems to be saying that this is caused by having cookie mismatches, but I've verified that they're the same. What am I missing here?

Running Erlang OTP 20.2 and rabbitMQ 3.7.3

Upvotes: 0

Views: 1436

Answers (1)

Doug Skurdal
Doug Skurdal

Reputation: 11

I have noticed that join_cluster is case sensitive when it comes to the machine name.

Upvotes: 1

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