JRuby Dev Team @jruby

Operated by @headius, @tom_enebo, @hiro_asari jruby.org In your Java Joined September 2008

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JRuby Dev Team @jruby

a week ago

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! jruby.org/2025/08/28/jru…

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JRuby Dev Team @jruby

4 weeks ago

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! jruby.org/2025/08/07/jru…

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JRuby Dev Team @jruby

2 months ago

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! jruby.org/2025/07/17/jru…

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JRuby Dev Team @jruby

2 months ago

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! github.com/jruby/warbler/…

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JRuby Dev Team @jruby

3 months ago

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/docker-library…

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JRuby Dev Team @jruby

3 months ago

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! jruby.org/2025/06/10/jru…

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NanoVMs @nanovms

3 months ago

this week on the unikernel application spotlight we check out @jruby youtube.com/watch?v=72wlDv… real threads && jvm interop - congrats on 10.x release and 24 yrs! @headius

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Charles Oliver Nutter @headius

3 months ago

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!

Alex Rodionov @p0deje

3 months ago

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Matthew Berg @wnyconservative

4 months ago

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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JRuby Dev Team @jruby

4 months ago

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! cve.org/CVERecord?id=C… jruby.org/2025/05/07/jru… jruby.org/2025/05/07/jru…

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Charles Oliver Nutter @headius

4 months ago

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! blog.headius.com/2025/05/3d-cha…

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JRuby Dev Team @jruby

5 months ago

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! jruby.org/2025/04/14/jru…

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Charles Oliver Nutter @headius

5 months ago

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! buff.ly/IUQ1ixS

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Charles Oliver Nutter @headius

5 months ago

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 jruby.sh script. * On Windows, a new Rust-based exe is coming soon. Let us know if you have any issues: buff.ly/nLmlSh3

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JRuby Dev Team @jruby

6 months ago

JRuby 10 HEAD builds are now live in GitHub Actions setup-ruby and for any local Ruby installers that depend on jruby-dev-builder's jruby-head packages! Fingers crossed it doesn't cause too many problems, but let us know right away if something goes awry!

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JRuby Dev Team @jruby

6 months ago

It's almost time! JRuby 10 is approaching release, and toward that end we will be switching JRuby master from the 9.4 line to the 10.0 line this week. The "jruby-head" build from GHA "setup-ruby" action will remain 9.4 for now, but it's time to start testing with JRuby 10!

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Charles Oliver Nutter @headius

7 months ago

New post: Boosting JRuby Startup with AppCDS and AOT caching buff.ly/4jUEKJc

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JRuby Dev Team @jruby

7 months ago

JRuby 9.4.12.0 has been released with two important fixes: a thread-safety patch for recent Class#subclasses logic and an update for jar-dependencies to fix issues parsing Maven output on Java 9+. Let us know if you run into any new issues! buff.ly/4hQOCSh

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JRuby Dev Team @jruby

7 months ago

JRuby 9.4.11.0 is released with two critical fixes for bugs in 9.4.10.0 and a handful of stdlib upgrades. We recommend all users update to 9.4.11.0 and skip the 9.4.10.0 release. Let us know if you have issues! buff.ly/4aC0rcS

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JRuby Dev Team @jruby

8 months ago

We have released jar-dependencies 0.5.2, now that JRuby 9.4.10.0 can safely handle upgrading it independent of JRuby itself. This finally fixes issues sourcing jar dependencies from Maven in containerized environments (previously partially fixed by updating ruby-maven-libs).