Celluloid stack failure

Reel crash

Starting server...
E, [2013-03-05T22:49:49.841000 #13369] ERROR -- : MyServer crashed!
IOError: closed stream
org/nio4r/Nio4r.java:143:in `register'
/home/me/.rvm/gems/jruby-1.7.2/gems/celluloid-io-0.12.1/lib/celluloid/io/reactor.rb:42:in `wait'
/home/me/.rvm/gems/jruby-1.7.2/gems/celluloid-io-0.12.1/lib/celluloid/io/reactor.rb:21:in `wait_readable'
org/jruby/RubyBasicObject.java:1665:in `__send__'
org/jruby/RubyKernel.java:1809:in `public_send'
/home/me/.rvm/gems/jruby-1.7.2/gems/celluloid-0.12.4/lib/celluloid/calls.rb:23:in `dispatch'
/home/me/.rvm/gems/jruby-1.7.2/gems/celluloid-0.12.4/lib/celluloid/actor.rb:327:in `handle_message'
/home/me/.rvm/gems/jruby-1.7.2/gems/celluloid-0.12.4/lib/celluloid/tasks/task_fiber.rb:24:in `initialize'
/home/me/.rvm/gems/jruby-1.7.2/gems/celluloid-0.12.4/lib/celluloid/tasks/task_fiber.rb:23:in `initialize'

The setup

require 'reel'
require 'java'
Dir["lib/java/\*.jar"].each { |jar| require jar }
require 'sdb_client_proxy'
require 'async_handler'

class MyServer < Reel::Server
  def initialize(host = "127.0.0.1", port = 3000)
    sdb_client = com.amazonaws.services.simpledb.AmazonSimpleDBAsyncClient.new(
        com.amazonaws.auth.BasicAWSCredentials.new(KEY,SECRET)
    )
    @sdb_client_pool = SimpleDBClientProxy.pool(size: 100, args: [sdb_client])
    super(host, port, &method(:on_connection))
  end

  def on_connection(connection)
    while request = connection.request
      case request
        when Reel::Request
          connection.detach
          handle_request(request)
        when Reel::WebSocket
          # =)
      end
    end
  end

  def handle_request(request)
    @sdb_client_pool.async.find("production_users-1","783a3202-e167-41f6-a441-a4ce3fc12573") do |hash|
      request.respond :ok, hash.to_s
    end
  end

end

puts "Starting server..."
MyServer.run

Happens when load testing Reel