Apps generate exception when running from assembly JAR

[carlosedp]

I'm trying to generate assembly JARs for some applications(to run in a Docker container for example) and when run they generate exceptions.

Sample:
https://gist.github.com/carlosedp/8af4ec212bd987335c47933bee4c8db0

❯ scala-cli package -f zio-temporal.scala -o ziotemporal.jar --assembly

Wrote /Users/cdepaula/repos/scala-playground/zio/ziotemporal.jar, run it with
  ./ziotemporal.jar

❯ ll ziotemporal.jar
.rwxr-xr-x 57Mi cdepaula 13 Mar 09:28 ziotemporal.jar*

Error:

https://pastebin.com/TTEEJq49

On another application from https://github.com/carlosedp/zio-temporal-hello, I generate the Assembly and it returns:

https://pastebin.com/qdiKhkaB

Both run fine when I use the build tool run, like scala-cli zio-temporal.scala for the GIST and ./mill run worker.run.

[vitaliihonta]

Carlos or I will respond later. It may be caused by assembly misconfiguration. GRPC uses META-INF files to pick-up backend implementation in runtime. Those files (or classes specified inside them) may be accidentally dropped from the fat jar