DNS fails when using TCPSocket

Celluloid::IO issue appears to be failing standard DNS lookup when using Celluloid::IO::TCPSocket inside of Http.rb. After hacking away down to a minimum set of reproable steps, here's the issue:

_Without Celluloid::IO::TCPSocket:_

Code:

require 'celluloid'
require 'celluloid/autostart'
require 'celluloid/io'
require 'http'

class HttpFetcher
  include Celluloid::IO

  def scan(url, options = {} )
    # puts "Request -> http://#{url}"
      use_options = true
      if (use_options)
              options = { socket_class: Celluloid::IO::TCPSocket
                              }
      end
      response = HTTP.get(url, options)
  end
end

Testing:

[1] pry(main)> require 'http'
=> true
[2] pry(main)> HTTP.get("http://client")
=> #<HTTP::Response/1.1 200 OK {"Server"=>"nginx/1.6.2", "Date"=>"Wed, 13 May 2015 16:48:34 GMT", "Content-Type"=>"text/html;charset=utf-8", "Content-Length"=>"1131", "Connection"=>"close", "X-Xss-Protection"=>"1; mode=block", "X-Content-Type-Options"=>"nosniff", "X-Frame-Options"=>"SAMEORIGIN"}>
[3] pry(main)> require './test'
=> true
[4] pry(main)> HttpFetcher.new.scan("http://client")
Resolv::ResolvError: DNS result has no information for client
from /var/lib/gems/2.1.0/gems/celluloid-io-0.16.2/lib/celluloid/io/tcp_socket.rb:64:in `initialize'
[5] pry(main)> E, [2015-05-13T16:48:43.333658 #388] ERROR -- : Actor crashed!
Resolv::ResolvError: DNS result has no information for client
    /var/lib/gems/2.1.0/gems/celluloid-io-0.16.2/lib/celluloid/io/tcp_socket.rb:64:in `initialize'
    /var/lib/gems/2.1.0/gems/celluloid-io-0.16.2/lib/celluloid/io/tcp_socket.rb:16:in `new'
    /var/lib/gems/2.1.0/gems/celluloid-io-0.16.2/lib/celluloid/io/tcp_socket.rb:16:in `open'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/timeout/null.rb:18:in `connect'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/connection.rb:31:in `initialize'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/client.rb:72:in `new'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/client.rb:72:in `make_request'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/client.rb:58:in `block in perform'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/cache/null_cache.rb:9:in `perform'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/client.rb:57:in `perform'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/client.rb:46:in `request'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/chainable.rb:72:in `request'
    /var/lib/gems/2.1.0/gems/http-0.8.4/lib/http/chainable.rb:16:in `get'
    /home/app/dashapp/test.rb:26:in `scan'
    /var/lib/gems/2.1.0/gems/celluloid-0.16.0/lib/celluloid/calls.rb:26:in `public_send'
    /var/lib/gems/2.1.0/gems/celluloid-0.16.0/lib/celluloid/calls.rb:26:in `dispatch'
    /var/lib/gems/2.1.0/gems/celluloid-0.16.0/lib/celluloid/calls.rb:63:in `dispatch'
    /var/lib/gems/2.1.0/gems/celluloid-0.16.0/lib/celluloid/cell.rb:60:in `block in invoke'
    /var/lib/gems/2.1.0/gems/celluloid-0.16.0/lib/celluloid/cell.rb:71:in `block in task'
    /var/lib/gems/2.1.0/gems/celluloid-0.16.0/lib/celluloid/actor.rb:357:in `block in task'
    /var/lib/gems/2.1.0/gems/celluloid-0.16.0/lib/celluloid/tasks.rb:57:in `block in initialize'
    /var/lib/gems/2.1.0/gems/celluloid-0.16.0/lib/celluloid/tasks/task_fiber.rb:15:in `block in create'

_Without Celluloid::IO::TCPSocket:_

Code:

require 'celluloid'
require 'celluloid/autostart'
require 'celluloid/io'
require 'http'

module Errors
  class NoWebResponse < StandardError; end
end

class HttpFetcher
  include Celluloid::IO

  def scan(url, options = {} )
    # puts "Request -> http://#{url}"
      use_options = false
      if (use_options)
          options = { socket_class: Celluloid::IO::TCPSocket
                              }
      end
      response = HTTP.get(url, options)
  end
end

Testing:

[1] pry(main)> require 'http'
=> true
[2] pry(main)> HTTP.get("http://client")
=> #<HTTP::Response/1.1 200 OK {"Server"=>"nginx/1.6.2", "Date"=>"Wed, 13 May 2015 16:59:26 GMT", "Content-Type"=>"text/html;charset=utf-8", "Content-Length"=>"1141", "Connection"=>"close", "X-Xss-Protection"=>"1; mode=block", "X-Content-Type-Options"=>"nosniff", "X-Frame-Options"=>"SAMEORIGIN"}>
[3] pry(main)> require './test'
=> true
[4] pry(main)> HttpFetcher.new.scan("http://client")
=> #<HTTP::Response/1.1 200 OK {"Server"=>"nginx/1.6.2", "Date"=>"Wed, 13 May 2015 16:59:42 GMT", "Content-Type"=>"text/html;charset=utf-8", "Content-Length"=>"1129", "Connection"=>"close", "X-Xss-Protection"=>"1; mode=block", "X-Content-Type-Options"=>"nosniff", "X-Frame-Options"=>"SAMEORIGIN"}>

celluloid / celluloid-io

DNS fails when using TCPSocket #145