JRuby Dev Team
@jruby
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Operated by @headius, @tom_enebo, @hiro_asari
In your Java
Joined September 2008
New post: Warbled Sidekiq: Zero-install Executable for JVM Previously, I showed how to use Warbler to package a simple tool as an executable jar. This post will demonstrate how to “warble” a larger project: the Sidekiq background job server! https://t.co/6Bv0Ndly1F
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New post: "Packaging Ruby Apps with Warbler: Executable JAR Files" Warbler is the JRuby ecosystem’s tool for packaging up Ruby apps with all dependencies in a single deployable file. Let’s use Warbler to create all-in-one packaged Ruby apps! https://t.co/uNyZ7Iu6Lh
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Warbler 2.1.0 has been released! Warbler allows you to package JRuby applications (with obfuscation of code) as a single binary, either a .jar file you can run directly or a .war file you can deploy to any Java application server. Blog post coming! https://t.co/ZpUtxYKrFp
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We have published Docker images for JRuby 9.4 and JRuby 10 on JDK 25! The -dev images are also updated to latest commits. Give them a try and let us know if there's any issues!
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At the end of my post on JRuby and JDK 25 startup time features, I teased a bit of the unreleased improvements from Project Leyden. It turns out the latest commits improve startup time even more, so it seems worth posting a quick follow-up! https://t.co/OJavH9BpXQ
reddit.com
Posted by headius - 24 votes and 0 comments
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New post: JRuby and JDK 25: Startup Time with AOTCache Let's take a look at JRuby's startup time journey, all the way up to using JDK 25's AOTCache and Project Leyden features coming to a JDK near you soon. https://t.co/aw4G6MKoo5
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JRuby 9.4.14.0 is released! We've updated a bunch of the standard library (including "cgi" to fix a couple of CVEs), fixed a few memory leaks and a bunch of compatibility issues, and generally stabilized things. Upgrading is recommended! https://t.co/X4FoGd4q33
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Official global X account of TOYOTA GAZOO Racing. Follow us to stay connected.
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JRuby 10.0.2.0 is released! This is a small release to fix an ArgumentError regression in JRuby 10.0.1.0 plus a few other small fixes. Recommended upgrade for all, but let us know if you run into any issues! https://t.co/GK7bH1dQbu
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We have just released JRuby 10.0.1.0, our first update to JRuby 10! There's dozens of patches including full support (finally) for Zeitwerk and a bunch of Ruby 3.4 language fixes. Upgrade today and let us know how it goes! https://t.co/vgbTTow6if
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We have released jruby-maven-plugins 3.0.6, updating JRuby to 9.4.13.0 along with several other improvements. But more exciting: Warbler is BACK! We've updated it for latest JRuby and dependencies and it's running green in CI. Time for feature requests! https://t.co/rorRiMe4Rd
github.com
It's been too long since this library had an update and release. This issue will track the tasks necessary. I cloned and ran tests locally with JRuby 10, and a number of areas need improvement:...
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FYI: now that Ubuntu 20.04 is EOL, future releases of the JRuby Docker image will be based on Ubuntu 22.04. This will take effect with releases 9.4.14.0 and 10.0.1.0, whenever they happen. See
github.com
Update Ubuntu to the latest published OCI tarballs as of 2025-06-01.
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DEVELOPING: Is Bitcoin Being Manipulated? How the Evidence is Stacking Up 👇
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JRuby 9.4.13.0 is released! We have fixed several user issues, including a slow leak in Java interface implementation, a possible deadlock between JIT and main threads, and backported launcher improvements from JRuby 10! https://t.co/jfToWcyXwK
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this week on the unikernel application spotlight we check out @jruby
https://t.co/SwF2OZzk93 real threads && jvm interop - congrats on 10.x release and 24 yrs! @headius
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That's right... JRuby is the only Ruby with a fully-portable, all-in-one distribution that works with Bazel's secure, closed-world builds. You want secure, stable, scalable Ruby, you use JRuby! Thanks for the chat at @rubykaigi!
This is required for proper remote builds with Bazel as it simply uploads the interpreter for the current platform to a remote machine and it won't compile it there. Due to this design, only JRuby can now be used with Bazel remote builds (hats off to @headius).
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One of my benchmarks for learning German is being able to construct Alle Kinder jokes, about whatever topic I happen to be thinking about. Still usually uncertain if I have the exact right words. Alle Kinder verwenden @jruby, außer Bill, der keine Leistung will.
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Meet the Redwood Battery Bin: a patented system designed to safely collect mixed batteries and devices at scale, with remote monitoring and fire safety at the core. With automated sensing and real-time telemetry, it unlocks the critical minerals sitting in America’s junk drawers
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Security advisory: We have released jruby-openssl gem 0.15.4, jruby 10.0.0.1, and jruby 9.4.12.1 to address CVE-2025-46551, disabled hostname verification by default. We recommend that all users upgrade! https://t.co/hkvoBbUnNo
https://t.co/lxEmCFoAeF
https://t.co/01TrMopv8m
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Seems like a few folks didn't think my 2D bar chart was "beautiful", so let's kick it up a notch with 3D, SVG, and PDF generation using the same JFreeChart family of libraries! https://t.co/6jgAbFBhSH
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It's finally here! JRuby 10 has been released with support for Ruby 3.4 (including 3.2 and 3.3 updates as well). Minimum Java version has been bumped up to Java 21, allowing us to support more modern JVM features. Begin your migration today! https://t.co/6DRhCRWUUr
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It's almost time! I've just published my first post on JRuby 10, "Part 1: What's New". More posts will follow in the coming weeks, but JRuby 10 itself should be generally available before my RubyKaigi talk next week! https://t.co/lrq0Zk5ymt
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We have released jruby-launcher 2.0! This version eliminates the old C++ code in favor of two options: * On Unix systems, just exec the https://t.co/ifAgOC0ikT script. * On Windows, a new Rust-based exe is coming soon. Let us know if you have any issues:
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