Operated by @headius, @tom_enebo, @hiro_asari
Joined September 2008
- Tweets 2,713
- Following 24
- Followers 5,477
- Likes 181
8 Photos and videos
Jun 11
JRuby 10.0.6.0 released! Updated jruby-openssl, faster Java interface support, and many other fixes and improvements. JRuby 10.0.x is our LTS version, so upgrading is recommended.
jruby.org/2026/06/11/jruby-1…
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Jun 8
JRuby 9.4.15.0 is released! This is the last regularly-scheduled release of JRuby 9.4.x and includes the last set of 9.4 fixes. Future releases will be done as needed for commercial JRuby users. Contact us if you need long-term JRuby 9.4 support.
jruby.org/2026/06/08/jruby-9…
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Apr 21
JRuby 10.1 is released! We've caught up with CRuby 4.0 after less than four months, and pushed a bunch of new optimizations: smaller objects, smaller numerics, and groundwork for many more. We'll maintain 10.0 as our stable line, but do try 10.1 yourself!
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Apr 6
JRuby 10.0.5.0 is released! This round we fixed some memory leaks when embedding multiple JRuby instances, a few pesky Windows bugs, and several Ruby compatibility blockers. Enjoy!
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Mar 18
Today we were informed of a low-severity vulnerability in the bcrypt-ruby gem. We worked with the maintainers to arrange a fix. Upgrading is recommended.
CVE-2026-33306: Integer Overflow Causes Zero Key-Strengthening Iterations at Cost=31 on JRuby
github.com/bcrypt-ruby/bcryp…
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Mar 4
JRuby 10.0.4.0 is released! A month after 10.0.3.0, we've addressed lots of one-off issues, a few memory and thread-safety fixes, and general compatibility and stabilization work. Enjoy!
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Feb 3
JRuby 10.0.3.0 is released! Over 80 issues and pull requests and 13 external contributors combined to help further stabilize our 10.0 series! There's lots of compatibility fixes, a few performance enhancements, and a number of library updates.
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JRuby Dev Team retweeted
23 Oct 2025
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!
buff.ly/ZEasNiu
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JRuby Dev Team retweeted
21 Oct 2025
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!
buff.ly/ZdXcCop
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15 Oct 2025
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!
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2 Oct 2025
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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JRuby Dev Team retweeted
26 Sep 2025
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!
reddit.com/r/ruby/comments/1…
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JRuby Dev Team retweeted
24 Sep 2025
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.
blog.headius.com/2025/09/jru…
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28 Aug 2025
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/jruby-9…
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7 Aug 2025
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/jruby-1…
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17 Jul 2025
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/jruby-1…
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25 Jun 2025
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/iss…
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17 Jun 2025
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/of…
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10 Jun 2025
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!
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this week on the unikernel application spotlight we check out @jruby youtube.com/watch?v=72wlDveI… real threads && jvm interop - congrats on 10.x release and 24 yrs! @headius
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