[ruby-talk:444831] JRuby 9.4.15.0 released
The JRuby community is pleased to announce the release of JRuby 9.4.15.0.
- Homepage: https://www.jruby.org/
- Download: Downloads — JRuby.org
JRuby 9.4.15.x targets Ruby 3.4 compatibility.
Thank you to our contributors this release, you help keep JRuby moving forward!
With this release, JRuby 9.4 moves into end-of-life (“EOL”). This means that future releases of 9.4.x will only be provided as needed by commercial JRuby users.
Get in touch with us if you require long-term support options for the JRuby 9.4.x series. 38 Issues and PRs resolved for 9.4.15.0
- #8801 ruby/logger gem broken after version 1.6.3 using JRuby on Windows
<Issues · jruby/jruby · GitHub;
- #8924 const_defined? returns false for External Constants in JRuby
10.0.1.0 and 9.4.14.0 <Issues · jruby/jruby · GitHub;
- #8974 Use RuboCop to clean up poms (9.4)
<https://github.com/jruby/jruby/pull/8974>
- #8990 Launcher defensive fixes 9.4
<https://github.com/jruby/jruby/pull/8990>
- #9000 JRuby 9.4.14.0 “wrong number of arguments” when jit.threshold=0
<Issues · jruby/jruby · GitHub;
- #9001 Backport indy ruby2_keywords ArgumentError fix
<https://github.com/jruby/jruby/pull/9001>
- #9002 Backport ArgumentError message update from 2010
<https://github.com/jruby/jruby/pull/9002>
- #9012 Rexml security updateUpdate rexml gem to solve CVE-2025-58767
(9.4) <https://github.com/jruby/jruby/pull/9012>
- #9030 Official JDK 25 support for JRuby 9.4
<https://github.com/jruby/jruby/pull/9030>
- #9031 Don’t restrict object search to modules
<https://github.com/jruby/jruby/pull/9031>
- #9032 Different arguments for each.map vs each and map alone
<Issues · jruby/jruby · GitHub;
- #9033 Backport jruby.sh and .jruby.release changes from 10
<https://github.com/jruby/jruby/pull/9033>
- #9037 fix: clear code-range when re-using a string buffer (#9035)
<https://github.com/jruby/jruby/pull/9037>
- #9044 Difference in Float() hex parsing between JRuby and CRuby
<Issues · jruby/jruby · GitHub;
- #9045 Fixes basic float hex value strings for Kernel#Float
<https://github.com/jruby/jruby/pull/9045>
- #9054 Migrate .java-version contents to .jruby.release (9.4)
<https://github.com/jruby/jruby/pull/9054>
- #9104 [9.4] Update jruby-openssl to v0.15.5 to resolve BouncyCastle
1.79 vulnerability (sonatype-2025-001911). <Issues · jruby/jruby · GitHub;
- #9105 [9.4] Update jruby-openssl to 0.15.5
<https://github.com/jruby/jruby/pull/9105>
- #9128 [9.4] fix(launcher): correct parsing of java release files under
Bash/msys2 etc on Windows <https://github.com/jruby/jruby/pull/9128>
- #9160 Update strscan to 3.1.7
<https://github.com/jruby/jruby/pull/9160>
- #9186 9032 Fix Different arguments for each.map vs each and map alone
<https://github.com/jruby/jruby/pull/9186>
- #9201 Extract float formatting into a static method (9.4)
<https://github.com/jruby/jruby/pull/9201>
- #9295 Issue with calling IO.popen(env, cmd, opts) on Windows
<Issues · jruby/jruby · GitHub;
- #9308 Process.detach raises ArrayIndexOutOfBoundsException if called
from a thread that is not the main thread <Issues · jruby/jruby · GitHub;
- #9311 Push a frame for thread toplevel
<https://github.com/jruby/jruby/pull/9311>
- #9347 Use JDK for File#flock on Windows
<https://github.com/jruby/jruby/pull/9347>
- #9351 Fix non-native IO.popen env + kwargs handling
<https://github.com/jruby/jruby/pull/9351>
- #9353 Update JNR dependencies
<https://github.com/jruby/jruby/pull/9353>
- #9377 Checking out aws-sdk-ruby creates a file with binary data.
<Issues · jruby/jruby · GitHub;
- #9387 [9.4] deps(stdlib): bump erb from 2.2.3 to 4.0.4.1 to resolve
CVE-2026-41316 <https://github.com/jruby/jruby/pull/9387>
- #9391 [9.4] [deps] bump jruby-openssl to 0.16.0
<https://github.com/jruby/jruby/pull/9391>
- #9415 Don’t read or write anything once length is zero
<https://github.com/jruby/jruby/pull/9415>
- #9443 JRuby 9.4 does not generate bytecode for newer JDK versions
<Issues · jruby/jruby · GitHub;
- #9444 Allow bytecode version to be open-ended
<https://github.com/jruby/jruby/pull/9444>
- #9464 [fix] escape shell metachars in chdir: to prevent injection
<https://github.com/jruby/jruby/pull/9464>
- #9467 [9.4] backport [ji] support
java.lang.Throwable#backtrace_locations (#9461) <https://github.com/jruby/jruby/pull/9467>
- #9477 Dist verification 9.4 <https://github.com/jruby/jruby/pull/9477>
- #9480 [fix] @JRubyMethod error with required>=1 and var-args
<https://github.com/jruby/jruby/pull/9480>
Charles Oliver Nutter Architect and Technologist Headius Enterprises
Headius Enterprises – 15 May 26
Headius Enterprises: JRuby Support from the Source
Enterprise JRuby support, consulting, and priority bug-fixing from the core developers who built it. 20+ years of JVM and Ruby expertise.
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