immutables.github.io | Documentation site | Static Site Generator library

I think the problem is that jackson can't find a way to construct your class.

Here's what works for me

Your immutables jar is too new or too old (or the Java version that you use to run your eclipse on is too new or too old).

You can check that java version in eclipse: Find the 'about eclipse' option (under the Eclipse menu on macs, and I think it's under 'help' on other OSes), then pick the configuration tab. Check for the java.home=.... entry in there, that'll be pointing at the JVM used to start eclipse itself. That is throwing out those errors, or, the immutables system ships with an internal compiler (and ecj is usually the java parser that projects use, as it is fast and open source), in which case that's the one that is throwing out the errors. It's hard to tell from the stack track which one's at fault.

So, I'd check the version of your immutables dep, and if it's very old, update it. Then I'd check the VM you're running eclipse on, and if it's very old, update that.

Actually, I'd ditch immutables and just use lombok, but then, I would :P

Updating to latest version should help fix this:

I was able to track down the issue with the Immutables Library and I posted the following issue: https://github.com/immutables/immutables/issues/1223

Basically, the library was creating an invalid Automatic-Module-Name tag in there pom.xml's when building the jar files. The values that we being set contained a "-" which is invalid.

Shoutout to @Naman for pointing me in the right direction! Thanks!

I am still wondering if it is possible to override the jar files module-name. It seems like it could be useful for users of a library to somehow override a libraries jar files module-name for situations like this.