Clojure Q&A - Recent activity in CIDER

Commented: how do you set -Djdk.attach.allowAttachSelf enabled so that I can interrupt a cider repl in emacs

Wed, 03 Sep 2025 06:45:25 +0000

You've accurately identified the timeout. CIDER (nrepl, in fact) first tries to interrupt the thread in a "legal" way, but if that doesn't succeed, it waits for 5 seconds and then kills the thread forcefully. It is not very "safe", might potentially corrupt memory or screw up locks, that's why it's a last resort, but it is totally fine to do that during development.

Welcome to Clojure! Hope you have fun.

Commented: passing command line arguments to clojure via `cider-jack-in` (GNUEmacs 27.1, CIDER 1.2.0)

Wed, 06 Dec 2023 09:59:19 +0000

Cesar, you suggest using `(setq cider-clojure-clj-aliases ":dev")`
When i look in the docs i only see the option `cider-clojure-cli-aliases` (so cli instead of clj)

I think that's what we should use! Greetz

Commented: Unable to locate a Java Runtime

Sat, 29 Jul 2023 18:32:12 +0000

Thank you for your guidance.

Commented: cider repl error ClassNotFoundException: jdk.javadoc.doclet.Doclet

Sat, 14 Jan 2023 18:02:58 +0000

Thanks for giving me a hint. I decided to change the jdk that lein is using by adding JAVA_CMD environment. C:\Program Files\Java\jdk1.8.0_231\bin\java. (Switched to jdk 8 instead of the default jdk 11). It's working now. This will allow me to continue learning for now. I still want to use jdk 11 for production apps so I will still have to fix this issue in the future.

I found this link helpful on how to switch jdk lein is using.

https://gist.github.com/camsaul/c982019fd915510677236cd4b720a583

Commented: With Emacs/Cider, what is the way to have local javadocs available?

Thu, 18 Aug 2022 12:49:03 +0000

Thank you.

Thus, I could plug-in your middleware this way:

(cider-add-to-alist 'cider-jack-in-dependencies "mx.cider/enrich-classpath" "1.9.0")
(cider-add-to-alist 'cider-jack-in-dependencies "mx.cider/tools.deps.enrich-classpath" "1.9.0")

It worked for me on Windows with Leiningen, once the Maven repo had been moved to C:\repo (a shorter path than the default one). Otherwize, Java would complain about ProcessBuilder being given too long args.

With tools.deps I had no success.