[Koha] Installing Koha on debian 13 failed

[Beda Szukics]

Good evening

I tried to install Koha on a new debian based server. I failed because 
rabbidmq-server couldn't be configured:

Setting up rabbitmq-server (4.0.5-6+deb13u2) ...
Created symlink 
'/etc/systemd/system/multi-user.target.wants/rabbitmq-server.service' → 
'/usr/lib/systemd/system/rabbitmq-server.service'.
Job for rabbitmq-server.service failed because the control process 
exited with error code.
See "systemctl status rabbitmq-server.service" and "journalctl -xeu 
rabbitmq-server.service" for details.
invoke-rc.d: initscript rabbitmq-server, action "start" failed.
● rabbitmq-server.service - RabbitMQ Messaging Server
      Loaded: loaded (/usr/lib/systemd/system/rabbitmq-server.service; 
enabled; preset: enabled)
      Active: activating (auto-restart) (Result: exit-code) since Tue 
2026-03-17 16:15:56 CET; 18ms ago
  Invocation: 1b25014fa7934c3d92e16dd4f22bd900
     Process: 20645 ExecStart=/usr/lib/rabbitmq/bin/rabbitmq-server 
(code=exited, status=1/FAILURE)
    Main PID: 20645 (code=exited, status=1/FAILURE)
      Status: "Standing by"
    Mem peak: 69.5M
         CPU: 854ms
dpkg: error processing package rabbitmq-server (--configure):
  installed rabbitmq-server package post-installation script subprocess 
returned error exit status 1


dpkg: dependency problems prevent configuration of koha-common:
  koha-common depends on rabbitmq-server; however:
   Package rabbitmq-server is not configured yet.

dpkg: error processing package koha-common (--configure):
  dependency problems - leaving unconfigured


Errors were encountered while processing:
  rabbitmq-server
  koha-common
Error: Sub-process /usr/bin/dpkg returned an error code (1)


What went wrong? How to fix?