Thursday, December 07 2017

The JRuby community is pleased to announce the release of JRuby


JRuby 9.1.x is our current major version of JRuby. It is expected to be compatible with Ruby 2.3.x and stay in sync with C Ruby. JRuby is our latest release…

1. Major features of JRuby 9000:

  • Ruby 2.x compatibility
  • A new optimizing runtime based on a traditional compiler design
  • New POSIX-friendly IO and Process
  • Fully ported encoding/transcoding logic from MRI
  • If you do find issues then report them on using our issue tracker at We also encourage users to join our IRC channel (#jruby on Freenode) and mailing lists. You may also follow @jruby on Twitter for updates.

2. Highlights:

  • Rubygems updated to version 2.6.14
  • \K suported in regexps
  • Socket close_on_exec support
  • 30 issues fixed for

3. Github Issues resolved for

#4882 - Ripper doesn't handle private def with nested block
#4881 - Don't unconditionally emit debug level info from RACC
#4880 - Dead Exception in RealClassGenerator
#4874 - Update rake's url
#4871 - A regexp with \K doesn't work in JRuby
#4869 - throws exception (JRuby
#4866 - Rails parsing time ends with usec 1 instead of 0
#4865 - OOM due to unbounded rescuePCs growth
#4862 - Mutex sleeps indefinitely with timeout <= 0.0001 seconds
#4861 - cannot link Java class com.util (java.lang.NoClassDefFoundError: com/util (wrong name: com/Util))
#4860 - Fix issues discovered using Error Prone
#4858 - undefined "close_on_exec=" for TCPSocket
#4857 - OpenSSL::Cipher#random_iv Regression in
#4854 - Simultaneous client reads / writes to the same socket from different threads can deadlock
#4852 - [#3953] Use java.nio for FileTest#symlink?
#4849 - Gem::LoadError: You have already activated rack-cors 1.0.1, but your Gemfile requires rack-cors 1.0.2
#4844 - Potential bug in internal/runtime/ThreadService?
#4843 - popen doesn't work on Windows
#4842 - copy_stream to SSL seems to read the file into memory
#4838 - Fiber#alive? returns true even when already finished
#4837 - String#concat(java.lang.String) does not work
#4740 - activation of jar-dependencies in bundler clashes with shipped gem
#4701 - IO.copy_stream doesn't seem to limit the chunk size
#4696 - OpenSSL::Random.random_bytes specs seem to get stuck on Travis
#4685 - Rails csfr_meta_tag requires minutes to render due to jruby use of /dev/random on a virtual machine
#4677 - __FILE__ is not available in BEGIN section
#4460 - RangeError: bignum too big to convert into `long'
#4384 - JRuby counterpart for RubyVM.stat
#3953 - File.symlink? fails on Windows, in
#3903 - defined? with a colon2 fully resolves the left constant


Home —

jruby/jruby: JRuby, an implementation of Ruby on the JVM


Leave a Reply

Your email address will not be published. Required fields are marked *