Compatibility
What works with Minecraft 21w42a
Released 20 Oct 2021. Everything below comes from the projects' own published data, and each row says how we know.
Java requirement
Java 16 or newer
Published by Mojang for this exact version. An older runtime will not start it. Get a verified build.
Server software
No server software in our catalogue has published a build for 21w42a. For a snapshot that is normal: server projects usually wait for the full release.
Mod loaders
Support declared in each loader's own metadata.
- Fabric Loader0.19.3declaredsupported
- Quilt Loader0.30.1-beta.2declaredsupported
Frequently asked
Which Java version does Minecraft 21w42a need?
Java 16 or newer. Mojang publishes this requirement in the version metadata, so an older runtime will refuse to start the server.
Which server software supports 21w42a?
No server software in our catalogue has published a build for 21w42a yet.