EM::HttpRequest is blowing up here

dispatch_worker.rb

    def queue
      @json_headers = { "Content-Type" => 'application/json', 'Accept' => 'application/json'}
      if ::EM.reactor_running?
        # EM.synchrony do #start a new fiber...

          req = EM::HttpRequest.new(@@dispatcher_url)
          puts "dispatching worker #{@body}"
          req.apost({:head=>@json_headers, :body=>JSON.generate(@body)})
          req.callback do
            puts "dispatch worker - success!!"
            [true, "Worker queued"]
          end
          req.errback do
            puts "DISPATCH WORKER FAIL #{resp.error}"
            [false, "Connection to dispacher FAIL - #{resp.error}"]
          end

        # end
      else
        #running from console - just CURL
        req = "curl --url #{@@dispatcher_url} -H 'Content-Type: application/json' -H 'Accept: application/json' -d '#{JSON.generate(@body)}'"
        puts "CURLING #{req}"
        resp = `#{req}`
        puts "resp= #{resp}"
      end
      
    end

results

dispatching worker {"photo_id"=>"139", "s3_key"=>"uploaded_images/2011/06/03/150941/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatching worker {"photo_id"=>"140", "s3_key"=>"uploaded_images/2011/06/03/150941/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatching worker {"photo_id"=>"141", "s3_key"=>"uploaded_images/2011/06/03/150942/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatching worker {"photo_id"=>"143", "s3_key"=>"uploaded_images/2011/06/03/150942/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatching worker {"photo_id"=>"142", "s3_key"=>"uploaded_images/2011/06/03/150941/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatch worker - success!!
dispatching worker {"photo_id"=>"144", "s3_key"=>"uploaded_images/2011/06/03/150942/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatching worker {"photo_id"=>"145", "s3_key"=>"uploaded_images/2011/06/03/150944/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatching worker {"photo_id"=>"146", "s3_key"=>"uploaded_images/2011/06/03/150943/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatching worker {"photo_id"=>"147", "s3_key"=>"uploaded_images/2011/06/03/150945/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatching worker {"photo_id"=>"148", "s3_key"=>"uploaded_images/2011/06/03/150944/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatching worker {"photo_id"=>"149", "s3_key"=>"uploaded_images/2011/06/03/150947/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}
dispatch worker - success!!
dispatching worker {"photo_id"=>"150", "s3_key"=>"uploaded_images/2011/06/03/150947/yummyfood01.jpg", "thumbs"=>["145", "200", "300", "600"]}

Assertion failed: (!bWatchOnly), function Write, file ed.cpp, line 848.
Abort trap