multithreading - Rails, ActionController::Live, Puma: ThreadError -

i want stream notification client. this, use redis pup/sub , actioncontroller::live. here streamingcontroller looks like:

class streamingcontroller < actioncontroller::base   include actioncontroller::live    def stream     response.headers['content-type'] = 'text/event-stream'      $redis.psubscribe("user-#{params[:user_id]}:*") |on|       on.pmessage |subscription, event, data|         response.stream.write "data: #{data}\n\n"       end     end   rescue ioerror     logger.info "stream closed"   ensure     response.stream.close   end end 

here js part listen stream:

var source = new eventsource("/stream?user_id=" + user_id); source.addeventlistener("message", function(e) {   data = jquery.parsejson(e.data);    switch(data.type) {     case "unread_receipts":       updateunreadreceipts(data);       break;   } }, false); 

now if push redis, client gets push-notification. works fine. when click on link nothing happening. after canceling rails server (i use puma) ctrl+c got following error:

threaderror: attempt unlock mutex locked thread

the problem can solved after adding config.middleware.delete rack::lock development.rb, don't see console output after pushing client. config.cache_classes = true , config.eager_load = trueare no options because don't want restart server every time in development.

is there other solution?

if want avoid restarting server pick changes think you'd need running multiple processes.