2010: JRuby skips ensure blocks when killed

Monday, March 1, 2010

When you kill a JRuby process (e.g. with a SIGINT) you can’t bank on ensure blocks being executed. Of course, this is worrisome – file handles and other connections won’t be closed. The problem boils down to this example:

$ cat kill_me.rb
begin
  sleep
ensure
  puts 'executed ensure'
end
$
$ ruby -v
ruby 1.8.6 (2008-08-11 patchlevel 287) [universal-darwin9.0]
$
$ ruby kill_me.rb
^Cexecuted ensure
kill_me.rb:2:in `sleep': Interrupt
    from kill_me.rb:2
$
$ jruby -v
jruby 1.4.0 (ruby 1.8.7 patchlevel 174) (2009-11-02 69fbfa3) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_13) [x86_64-java]
$
$ jruby kill_me.rb
^C$

Standup 08/05/2009: BugMash this weekend

Pivotal Labs

Wednesday, August 5, 2009

Interesting Things

RailsBridge is organizing a global BugMash to help knock down some of
the bugs on the Rails lighthouse this weekend. If your interested in helping out there is more information on their wiki
We started using JRuby for a project and wanted to use JRuby to run our specs. If you install RSpec 1.2.7 or higher you can specify the ruby command used to run your SpecTask in rspec.rake like this:

  desc "Run all specs in spec directory (excluding plugin specs)"
  Spec::Rake::SpecTask.new(:spec) do |t|
    t.spec_opts = ['--options', ""#{File.dirname(__FILE__)}/../../spec/spec.opts""]
    t.spec_files = FileList['spec/**/*/*_spec.rb']
    t.ruby_cmd = 'jruby'
  end

New York Standup 11/24/2008

Mike Grafton

Monday, November 24, 2008

Interesting

Rails 2.2.2 is released!
Even Rails 2.2.2 isn’t always threadsafe. I found this out by running a script with JRuby from the command line. The script loaded the Rails environment and then launched two threads that simply tried to resolve an ActiveRecord class constant. Fireworks (in the form of LoadError) ensued deep inside of const_missing. I’ll post the full example later today.
Tsearch2 is now built into Postgres (as of 8.3). This means you must remove the metadata from your tables, since Postgres now stores it in a separate place.