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Feature Request: Please Add Java 21 Zulu Support

Feature Request

Hello UltraServers Team,

I would like to request that you add Java 21 Zulu as an available runtime option on UltraServers. In my testing, Java 21 Zulu has proven to be faster, more optimized, and overall better performing than Java 21 GraalVM.

I conducted direct tests on my own server and observed significant performance improvements when using Java 21 Zulu. This change would greatly benefit many UltraServers customers.

For reference, I’m running Leaf MC (not “Leaves MC” this is a different software) with Java 21 Zulu, and the combination delivers outstanding results. Even on an EPYC CPU server, it runs more stably compared to a Ryzen CPU server using Java 21 GraalVM.

Thank you for considering this feature. I believe it will make a big difference for performance-focused customers like me.

Best regards,

Green

Posted by hxgreen. ·
Status: Completed3 comments

Comments3

  • Mortis

    Team•

    Oct 31, 2025

    We support Java 21 to Java 24, but not Zulu. Technically, https://github.com/skullians/native-leak-profiling/pkgs/container/native-leak-profiling has Zulu, and support can apply these at request. If we see enough real usage, we’ll implement this as a self-selection option.

  • kqzs

    •

    Oct 13, 2025

    •

    Merged request

    •

    1 vote

    Add Java21 Runtime

    add it, I want to run a plugin which required higher version of java runtime

  • starfruit2210

    •

    Sep 23, 2025

    add java 22 too for zulu plz