rabbitmq-server @3.6.15_0 installed binary will not run with listed dependency erlang @21.0_0

[sarcas (James Bell)]

OS: 10.13.6 XCode: 9.4.1

MacPort's current rabbitmq-server is at version 3.6.15, and the current version of erlang is 21.

The rabbitmq-server port will install successfully. After installation is completed, attempting to run the binary to set up the server will give an error:

sudo rabbitmq-server
Password:


BOOT FAILED
===========

Error description:
   noproc
...  <snipped>

I've tracked this down to changes in Erlang 21. According to the RabbitMQ developers, no version of RabbitMQ prior to 3.7.7 has Erlang 21 compatibility: ​https://www.rabbitmq.com/changelog.html

To check this is the cause, I checked out the previous version of Erlang in MacPorts (at 09ae4b4f3e), which gives erlang @20.3_0. WIth this installed, RabbitMQ runs

sudo rabbitmq-server

              RabbitMQ 3.6.15. Copyright (C) 2007-2018 Pivotal Software, Inc.
  ##  ##      Licensed under the MPL.  See http://www.rabbitmq.com/
  ##  ##
  ##########  Logs: /opt/local/var/log/rabbitmq/rabbit<>.log
  ######  ##        /opt/local/var/log/rabbitmq/rabbit<>-sasl.log
  ##########
              Starting broker...
 completed with 0 plugins.

I suspect the correct MacPort style fix here is to update the rabbitmq-server port, but don't currently know enough to understand how to do this.

[tehfink]

Thanks. Ran into this same issue on OS 10.13.4 & XCode: 9.4

[kencu (Ken)]

Indeed, the port will need to be updated.

"RabbitMQ 3.7.7 is out and supports Erlang/OTP 21 [1]."

<​https://groups.google.com/forum/#!msg/rabbitmq-users/KbOldePfgYw/cjYzldEJAQAJ>

It's not a simple-looking port, but perhaps with luck it will be just a version / checksum change (dreaming...).

I don't use it, so have no idea how to test it.

Looks like Author: Zero King <l2dy@…> has done the last several changes, but the port is nomaintainer.

[ostefano (Stefano Ortolani)]

In the meanwhile it would be nice to have a mechanism to pin a specific version of erlang, so to handle upgrade outdated scenarios gracefully.

[ltalirz (Leopold Talirz)]

Thanks a lot for providing this workaround - this problem is really hard to debug for someone who has never had to interact with Erlang before, since the error message (noproc) does not provide any useful hints.

For others suffering from this issue, here the instructions to go back to erlang 20.3 (which, to be honest, could also be a bit easier...)

git clone --single-branch https://github.com/macports/macports-ports.git
cd macports-ports/lang/erlang/
git checkout 66b25e1930aecb7642060ecaf1d471f4e830e830
sudo port install

Plus the link to the commit history: ​https://github.com/macports/macports-ports/commits/master/lang/erlang

[sarcas (James Bell)]

The rabbitmq-server port ​was updated in December which closes this ticket off. Thanks to Scanner for the fix! I don't appear to have the ability to mark this ticket as resolved, but if someone who does has the time to close the ticket that would be wonderful.

Thanks again!