(NameError) uninitialized constant Java::BacktypeStorm::Config::CONFIG

[stonegao]

Tried redstorm with other extra gems dependencies (Mongoid, Resque), I start topology using the following command:

RACK_ENV=development redstorm local lib/redstorm-topology/event_topology.rb

But it throw uninitialized constant Java::BacktypeStorm::Config::CONFIG error. Also I am using Mac OS X but the JRuby stack trace has some weird lines related with WIN32API:

launching java -cp "/Users/stone/code/redstorm-topology/target/classes:/Users/stone/code/redstorm-topology/target/dependency/*" redstorm.TopologyLauncher local lib/redstorm-topology/event_topology.rb
file:/Users/stone/code/redstorm-topology/target/dependency/jruby-complete-1.6.5.jar!/builtin/javasupport/core_ext/object.rb:99 warning: already initialized constant Config
RedStorm v0.2.1 starting topology EventTopology in local environment
1    [main] ERROR org.apache.zookeeper.server.NIOServerCnxn  - Thread Thread[main,5,main] died
org.jruby.exceptions.RaiseException: (NameError) uninitialized constant Java::BacktypeStorm::Config::CONFIG
    at org.jruby.RubyModule.const_missing(org/jruby/RubyModule.java:2590)
    at #.(root)(file:/Users/stone/code/redstorm-topology/target/dependency/jruby-complete-1.6.5.jar!/META-INF/jruby.home/lib/ruby/site_ruby/shared/Win32API.rb:2)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at #.Dir(file:/Users/stone/code/redstorm-topology/target/dependency/jruby-complete-1.6.5.jar!/META-INF/jruby.home/lib/ruby/site_ruby/shared/Win32API.rb:14)
    at #.(root)(file:/Users/stone/code/redstorm-topology/target/dependency/jruby-complete-1.6.5.jar!/META-INF/jruby.home/lib/ruby/1.8/tmpdir.rb:9)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at #.(root)(file:/Users/stone/code/redstorm-topology/target/dependency/jruby-complete-1.6.5.jar!/META-INF/jruby.home/lib/ruby/1.8/tmpdir.rb:5)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at #.(root)(/Users/stone/.rvm/gems/jruby-1.6.5/gems/rack-1.2.4/lib/rack/utils.rb:1)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at #.(root)(/Users/stone/.rvm/gems/jruby-1.6.5/gems/rack-1.2.4/lib/rack/request.rb:3)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at #.(root)(/Users/stone/.rvm/gems/jruby-1.6.5/gems/rack-1.2.4/lib/rack/showexceptions.rb:1)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at #.(root)(/Users/stone/.rvm/gems/jruby-1.6.5/gems/sinatra-1.2.7/lib/sinatra/showexceptions.rb:6)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at #.(root)(/Users/stone/.rvm/gems/jruby-1.6.5/gems/sinatra-1.2.7/lib/sinatra/base.rb:1)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at Bundler::Runtime.require(/Users/stone/.rvm/gems/jruby-1.6.5/gems/resque-1.19.0/lib/resque/server.rb:68)
    at org.jruby.RubyArray.each(org/jruby/RubyArray.java:1612)
    at Bundler::Runtime.require(/Users/stone/.rvm/gems/jruby-1.6.5/gems/bundler-1.0.21/lib/bundler/runtime.rb:66)
    at org.jruby.RubyArray.each(org/jruby/RubyArray.java:1612)
    at Bundler::Runtime.require(/Users/stone/.rvm/gems/jruby-1.6.5/gems/bundler-1.0.21/lib/bundler/runtime.rb:55)
    at #.require(/Users/stone/.rvm/gems/jruby-1.6.5/gems/bundler-1.0.21/lib/bundler.rb:122)
    at #.(root)(/Users/stone/code/redstorm-topology/lib/redstorm-topology/boot.rb:17)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at Kernel.require(/Users/stone/code/redstorm-topology/lib/redstorm-topology/boot.rb:55)
    at #.(root)(./lib/redstorm-topology/event_topology.rb:4)
    at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1038)
    at Kernel.require(./lib/redstorm-topology/event_topology.rb:55)
    at #.main(/Users/stone/.rvm/gems/jruby-1.6.5/gems/redstorm-0.2.1/lib/red_storm/topology_launcher.rb:42)

I am using Bundler to manage gem dependencies, boot.rb is just copy & paste from rails:

require 'rubygems'

# Set up gems listed in the Gemfile.
PROJECT_ROOT = File.expand_path('../../..', __FILE__)

gemfile = File.join(PROJECT_ROOT, 'Gemfile')
begin
  ENV['BUNDLE_GEMFILE'] = gemfile
  require 'bundler'
  Bundler.setup
rescue Bundler::GemNotFound => e
  STDERR.puts e.message
  STDERR.puts "Try running `bundle install`."
  exit!
end if File.exist?(gemfile)

Bundler.require(:default)

BTW: I think it's great if you can create a redstorm starter project to demonstrate the project source code layout, how to manage dependencies and how to using JRuby with Java together to develop storm topologies. (redstorm it's self is a great example, but another one which focus on the usage of redstorm is awesome).

Thanks for your help

Stone

[colinsurprenant]

Hi Stone,

I am not sure I understand what you are trying to do here. It seems you are trying to use RedStorm from within Rails? I did not test RedStorm with Rail nor Bundler. Check the RedStorm README for instructions on how to use gems with RedStorm.

I think you should try to keep your RedStorm project separate from Rails. Is there any specific reason for this? Do you need to share Rails code (models?)

Colin

[stonegao]

Hi Colin,

Sorry for the confusion.

I am not using redstorm from within Rails. I setup a sperate project and the aforementioned boot.rb is borrowed from a Rails project, because I don't want require libs explicitly in my code.

Finally I figured out the problem: in Gemfile of the redstorm project, there's one line like following :

gem "resque", :require => "resque/server"

And this line caused the weird uninitialized constant Java::BacktypeStorm::Config::CONFIG error. After changing that line to:

gem "resque"

Bundler works like a charm now with redstorm. (But the error message of JRuby is indeed confusing and weird)

RedStorm README suggested put gems in target/gems/, since Bundler works well with redstorm, is it possible for redstorm to use Bundler managing gems and puts them in vendor/cache ?

Stone

[colinsurprenant]

Ok! Sure, making RedStorm work with bundler is on my todo. Btw, using bundler like this will work using the local cluster but will not work on a remote production cluster unless the gems are installed in target/gems. For gem to be available on the remote production servers, they must be packaged into the "production" jar file.

[jondot]

@stonegao please check out my pull request. there's a good chance that the original cause wasn't the require statement that you found.
hope it helps.