what build tool are you using?

when you look in the aot output, does that class exist?

if you are using a dependency that is aot compiled, everything will be terrible

(re: direct linked dependencies)

In my case, leiningen, and yes, that class definitely exists in the uberjar. It’s a sporadic error and I’ve only seen it manifest from this shutdown hook, so I tend to suspect a race condition or some kind or another.

are you running in docker?

No, just a bog-standard EC2 instance