Using Thin for Simultaneous Queries

Question

I have a Rails 4.1 application with a simple controller that passes the response:

class ServerSentEventsController < ApplicationController
  include ActionController::Live

  def index
    response.headers['Content-Type'] = 'text/event-stream'
    sse = ServerSentEvent.new(response.stream)

    begin
      loop do
        sse.write(time: Time.now)
        sleep 1
      end
    rescue IOError
      # When the client disconnects, we'll get an IOError on write
    ensure
      sse.close
    end
  end
end

When I add puma to my gemfile and make a request for this route with curl, I get a streaming response as expected:

curl -i 'http://localhost:3000/sse'
<!-- truncated headers output -->    
data: {"time":"2014-08-29 05:16:00 +0100"}

data: {"time":"2014-08-29 05:16:01 +0100"}

data: {"time":"2014-08-29 05:16:02 +0100"}

When I switch to thin in my gemfile and make a request, the whole thing is blocked. I read in several places that thin can handle concurrent requests, but I can't get it to work.

I start puma just by running bundle exec rails server. For thin, I tried bundle exec rails serverseveral configurations of the type bundle exec thin start -a 127.0.0.1 -threaded. Nothing seems to interfere with subtle locking.

How can I get subtle to accept concurrent requests?

Answer 1

, ,

  bundle exec thin start -a 127.0.0.1 --threaded -e production