Has anyone seen this before and know what I'm doing wrong here? Happy to provide a reproducible example

main.kt

file if it's useful.

It could be that your Shadow jar is missing the mime.types file from the core JAR

Thank you! Looks like I needed to add

mergeServiceFiles()

inside of my

shadowJar { ... }

block

Np 🙃

I had the same problem (came here for that) will check if the solution works for me

Sure, we can stick it into the faq, and I'll see if I can improve the error. TBH it is a pretty common problem with shadow jarring any app.

Jib looks like a really nice way to structure things. Having a "preferred" way to deploy http4k applications would be great.

Its a very clever idea (and simple really) - by spitting external dependencies into separate layers you can leverage really small download times for deployments/new pods as generally your app code is only a few kB of layer. Definitely worth checking out.