Vladimir proposed that we convert some tests to Kotlin. The general reaction was against the idea[1]. After receiving this feedback, he went ahead anyway[2].
I propose that we remove all Kotlin from our source code, including tests. The benefits of being a hybrid Java+Kotlin project do not outweigh the negatives. We should go back to being solely Java. (I would make an exception for build.gradle.kts, because build scripts are generally in a different language.) Vladimir clearly has a lot of enthusiasm to change the build system, coding style, the languages we use. I tend to be more conservative (don’t fix things that aren’t broken). Speaking personally, I find working with Vladimir extremely stressful. Of course, a lot of the things he is removing are things that I personally have created, so I naturally take this more personally than most people. Still, his actions over the last few weeks have left me angry, depressed, and burned out with the project. Julian [1] https://lists.apache.org/thread.html/c95bc24a10952ccaaa8ac1f959bf65aec450b8bf2fa36ba99dd0df08%40%3Cdev.calcite.apache.org%3E <https://lists.apache.org/thread.html/c95bc24a10952ccaaa8ac1f959bf65aec450b8bf2fa36ba99dd0df08@%3Cdev.calcite.apache.org%3E> [2] https://github.com/apache/calcite/commit/b93ec5a9edb7459696385e6adad67b92b6d406d7 <https://github.com/apache/calcite/commit/b93ec5a9edb7459696385e6adad67b92b6d406d7>
