the clojure version matches the one in my deps.edn file, so i'm curious about the java version.

i'm guessing emacs is just searching my OS according to some set of rules. This is frustrating because it's probably not going to play nice with jenv

• java: it just invokes whatever process your project is based on: clj, lein, etc and does that. It doesn’t choose, just execs the program. Same as if you typed into a terminal clj. The environment dictates the java version • clojure: always from the project tool you are using, lein or clj

easiest way to figure this stuff out is to start an eshell and then which java

Welcome to the Emacs shell

~/projects/work/metabase $ which java
/Users/dan/.sdkman/candidates/java/current/bin/java
~/projects/work/metabase $ 

an easy way to remove this indirection. cider-jack-in. grab the jack in command from the *Messages* buffer. Save this form into a shell function. Then use that shell function to start the process and cider-connect to it

oh, and that startup form is also at the top of the repl banner message

which java from my emacs shell is saying ..jenv/shims/java and jenv version is openjdk...1.8 but the repl was starting with java 11.0.11 maybe it's ideal to just cider-connect (which is what your saying i suppose)

yeah i’d say its far more predictable without the extra exec-path of emacs

you might have to get into nitty gritty as to why you are getting different versions

might be the default java at the time you launched emacs

emacs might not be “in the directory” you expect when it execs the process so maybe not getting the settings for that dir?

it's a thought, ill look into it more later 🙂 thanks for the help.

I believe the Clojure executable file will search the operating exec path, $PATH, to look for a java executable, so it may find a java on the PATH before it finds jenv Also check to see if JAVA_HOME is set to a particular path (although this is less used now)

To use cider-connect there is an example deps.edn alias here (remove the -i option if you want a headless process (i.e. no repl prompt in the terminal) https://github.com/practicalli/clojure-deps-edn/blob/live/deps.edn#L118

Thanks John. I'll take a look. Maybe i should use something that updates path to...

Depending on the environment, it may also be possible to set the java.runtime.version=17 or other version of Java in a system.properties file in the root of the project, which can be useful when several versions of Java are available to the system. There are other properties, but it depends on the tooling as to if these properties are consulted. https://practical.li/clojure-web-services/app-servers/java-system-properties.html

Or that property may be able to be set with a -J option on the command line, or with Cider including a :jvm-opts key in an alias that is added to the cider-jack-in command (i.e. https://practical.li/spacemacs/clojure-projects/project-configuration.html). I am assuming an alias would be something like the following (but I havent tried this myself yet)

:jvm/report {:jvm-opts ["-Djava.runtime.version=17"]}