[rabbitmq-discuss] Error starting rabbitmq in IPv6 environment

Thu Dec 12 17:33:03 GMT 2013

Hi Simon,

This is what I get:

$ erl -sname foo
Erlang R16B02 (erts-5.10.3) [source] [64-bit] [smp:4:4] [async-threads:10]
[hipe] [kernel-poll:false]

Eshell V5.10.3  (abort with ^G)
(foo at a4ipn434)1> 

a4ipn434 is defined in /etc/hosts, and yes, is resolvable

$ ping6 a4ipn434
PING a4ipn434(a4ipn434.asl.lab.emc.com) 56 data bytes
64 bytes from a4ipn434.asl.lab.emc.com: icmp_seq=1 ttl=64 time=0.035 ms

Note that on linux, many of the legacy/IPv4 versions of system calls do
not work, and you have to use the IPv6 equivalent.  Please let me know if
I can provide you with any further information.

Thanks,
Ed

On 12/12/13 2:50 AM, "Simon MacMullen" <simon at rabbitmq.com> wrote:

>This looks like more of an Erlang-level problem, looks like it is
>failing before RabbitMQ starts starting. Can you start "erl -sname foo"
>in pure IPv6 mode?
>
>And of course, just to make sure, you can resolve a4ipn434, right? :-)
>
>Cheers, Simon
>
>On 11/12/2013 21:20, Tyrrill, Ed wrote:
>> Hi RabbitMQ devs,
>>
>> I have found a bug starting rabbitmq in a linux pure IPv6 environment
>> where /etc/resolv.conf has a "nameserver" line specifying an IPv6
>> address.  This is what I see:
>>
>> # service rabbitmq-server start
>> Starting rabbitmq-server: FAILED - check /var/log/rabbitmq/startup_{log,
>> _err}
>> rabbitmq-server.
>> # cat /var/log/rabbitmq/startup_log
>> ERROR: epmd error for host "a4ipn434": address (cannot connect to
>>host/port)
>>
>> Note that /etc/hosts specifies the FQ and short hostnames of the
>>machine:
>>
>> 2620:0:170:586::1:1a4ipn434.xxxxxxxxxxx a4ipn434
>>
>> And /etc/resolv.conf specifies a nameserver with an IPv6 address:
>>
>> nameserver 2620:0:170:58e::4
>>
>> If I comment out this nameserver line in resolv.conf, then rabbitmq
>> starts with no problem:
>>
>> # service rabbitmq-server start
>> Starting rabbitmq-server: SUCCESS
>> rabbitmq-server.
>> # cat /var/log/rabbitmq/startup_log
>>
>>                RabbitMQ 3.2.0. Copyright (C) 2007-2013 GoPivotal, Inc.
>>    ##  ##      Licensed under the MPL.  See http://www.rabbitmq.com/
>>    ##  ##
>>    ##########  Logs: /data01/avamar/var/rabbitmq/log/rabbit at a4ipn434.log
>>    ######  ##
>>   /data01/avamar/var/rabbitmq/log/rabbit at a4ipn434-sasl.log
>>    ##########
>>                Starting broker... completed with 0 plugins.
>>
>> Also, FYI, I tried this with rabbitmq versions 3.2.1-1 and 3.2.0-1.
>>
>> Thanks,
>> Ed
>>
>>
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>>
>
>