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Memory leak running RubyGems in separate runtimes in a loop

Status: Open.

#9187 In jruby/jruby;

· headius opened on Jan 27, 2026

Performance regression in RubyHash for large hashes (~8-10x slower than JRuby 1.7)

Status: Open.

#9113 In jruby/jruby;

· tbsvttr opened on Dec 4, 2025

Double unresolved super from aliased method when compiled with indy

Status: Open.

#8944 In jruby/jruby;

· headius opened on Aug 6, 2025

define_method conversion fails to yield after indy JIT

Status: Open.

#8946 In jruby/jruby;

· headius opened on Aug 7, 2025

Error during <code>gem push</code> using jruby

Status: Open.

#8935 In jruby/jruby;

· schneems opened on Jul 31, 2025

<code>import_methods</code> doesn't allow calling another refined method

core

needs tests

refinementsThe cursed featureThe cursed feature

Status: Open.

#8876 In jruby/jruby;

· esotericpig opened on Jun 25, 2025

ruby/logger gem broken after version 1.6.3 using JRuby on Windows

windows

Status: Open.

#8801 In jruby/jruby;

· gacha opened on Apr 28, 2025

Memory Leak in BiVariableMap when Sharing Variables is enabled

Status: Open.

#8527 In jruby/jruby;

· matthias-fratz-bsz opened on Dec 16, 2024

Tracing <code>:call</code> doesn't work if the traced code is running on a different thread

Status: Open.

#8697 In jruby/jruby;

· mauricioszabo opened on Mar 14, 2025

<code>Redis::ConnectionError</code> with JRuby 10

regression

Status: Open.

#8786 In jruby/jruby;

· ankane opened on Apr 20, 2025

Default to universal newline conversion on Windows

Status: Open (in progress).

jruby/jrubynumber 9067

#9067 In jruby/jruby;

· headius opened on Nov 8, 2025

Fix memory leak in Concurrent/ThreadSafeLocalContextProvider, using Cleaner API for JRuby 10

Status: Open (in progress).

jruby/jrubynumber 8561

#8561 In jruby/jruby;

· matthias-fratz-bsz opened on Jan 8, 2025

<code>already initialized constant</code> warnings for Java classes in 9.4.11

Status: Open.

#8620 In jruby/jruby;

· kalenp opened on Feb 11, 2025

Inconsistency with block parameter default value

Status: Open.

#9208 In jruby/jruby;

· katafrakt opened on Feb 2, 2026

Data.define single-attribute class rejects positional arguments

Status: Open.

#9214 In jruby/jruby;

· rossroberts-toast opened on Feb 3, 2026

Ignore empty kwrest in Data subtypes' constructors

Status: Draft (not ready).

jruby/jrubynumber 9215

#9215 In jruby/jruby;

· headius opened on Feb 4, 2026

File.open w/ File::RDWR should write \r\n but gets should read as \n after rewind on windows

windows

Status: Open.

#3742 In jruby/jruby;

· enebo opened on Mar 17, 2016