[rabbitmq-discuss] Debugging clustering issues

Mon Jun 21 10:26:26 BST 2010

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Matthias Radestock wrote:
> Andreas,
> 
> On 21/06/10 09:10, Andreas Jung wrote:
>> ajung at blackmoon:~/sandboxes/occ> bin/rabbitmqctl stop_app
>> Stopping node rabbit at blackmoon ...
>> ...done.
>> ajung at blackmoon:~/sandboxes/occ> bin/rabbitmqctl reset
>> Resetting node rabbit at blackmoon ...
>> ...done.
>> ajung at blackmoon:~/sandboxes/occ> bin/rabbitmqctl cluster
>> rabbit at 192.168.0.103 <mailto:rabbit at 192.168.0.103>
>> Clustering node rabbit at blackmoon with ['rabbit at 192.168.0.103'] ...
>> ...done.
>> ajung at blackmoon:~/sandboxes/occ> bin/rabbitmqctl start_app
>> Starting node rabbit at blackmoon ...
>> ...done.
>> ajung at blackmoon:~/sandboxes/occ> bin/rabbitmqctl status
>> Status of node rabbit at blackmoon ...
>> [{running_applications,[{rabbit,"RabbitMQ","1.8.0"},
>>                          {mnesia,"MNESIA  CXC 138 12","4.4.10"},
>>                          {os_mon,"CPO  CXC 138 46","2.2.2"},
>>                          {sasl,"SASL  CXC 138 11","2.1.6"},
>>                          {stdlib,"ERTS  CXC 138 10","1.16.2"},
>>                          {kernel,"ERTS  CXC 138 10","2.13.2"}]},
>>   {nodes,[rabbit at blackmoon]},
>>   {running_nodes,[rabbit at blackmoon]}]
>> ...done.
>>
>> So the node running on 192.168.0.103 is _not_ part of the cluster as
>> 'status' shows.
>> How can I track this down?
> 
> I suspect the problem is that the way you refer to the other node - by
> its IP address - is not the way the node refers to itself. E.g. if the
> other node thinks it's 'rabbit at whitemoon' then that is what you must put
> in the 'cluster' command.

Ok. Since there is no DNS available on the network: 'blackmoon' must
have a local entry of the IP of 'whitemoon' in its local /etc/hosts file?

Why is there no further error message about the problem - either during
the  bin/rabbitmqctl cluster call or the following 'start_app' call?
This is kind of misleading...

Andreas
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