Or, What underlying implementation is clojure.tools.logging using?
Today I want to change the logging configuration of a Clojure program. Where is that configuration located? Changing the obvious resources/log4j.properties doesn’t seem to change the program’s behavior.
The program uses clojure.tools.logging, but that’s a wrapper around four different underlying implementations. Each of those implementations has its own ideas about configuration. How can I find out which one it uses?
Add a println to your program to output this:
In my case the output is:
Bet I’d have realized that a few hours earlier if I were pairing today. And then I wouldn’t have made this lovely post.
 or run it in the cider REPL in emacs, in your namespace
 actually it checks for log4j.xml first; if that’s found it’ll choose the xml file over the .properties.