[Koha] Koha 20.11 - RabbitMQ and lock_dir

[Tom Hanstra]

After our upgrade to Koha 20.11, we have noticed a couple of errors. I'm
trying to track them down and understand the changes.

- lockdir in XML configuration file

I get a warning about lockdir missing from the XML file, even after adding
the line. I added:

 <lockdir>/var/lock/koha</lockdir>

to my /etc/koha-conf.xml file but the error is still showing up in the
About Koha screen. Do I have to do something to clear it? Or did I
miss something?

- RabbitMQ as message broker

Reading the documentation, the addition of RabbitMQ as a message broker is
specifically done for PLACK. Do I really have to set up a local RabbitMQ or
is there another workaround? What am I gaining that did not work before?
Because adding another little piece of software is a bit of hassle.

If it is needed, where do I find documentation on setup?  The Wiki has
nothing that I found to be worthwhile. And if it is not (yet) needed, then
how do I remove the error?

Thanks,
Tom
-- 
*Tom Hanstra*
*Sr. Systems Administrator*
hanstra at nd.edu