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

# http4k

[kushalp]

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.

[dave]

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

[dave]

There are options you can send to shadow to merge the jars

[kushalp]

Thank you! Looks like I needed to add mergeServiceFiles() inside of my shadowJar { ... } block

[dave]

Np 🙃

[Jaap]

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

[Jaap]

also works for me. is this somewhere documented? i was unable to find solutions in the net. would be great to have a gradle guide on the http4k site. i mean its great documentation so this is missing maybe? or what are you guys using for packaging

[dave]

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.

[dave]

By default we tend to use the gradle application plugin, or more recently use Google Jib for K8S

[kushalp]

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

[dave]

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.

[dave]

But of course that only works for K8s and similar - CF and heroku mostly use standard distribution zips afaik

[dave]

Tweaked the message. Anyone with this problem will receive this message now in the stack:

Could not find 'myfile.txt' inside META-INF. If using Shadow JAR, add mergeServiceFiles() to the configuration