Code for reproducing ERROR -- : RedisActor: CLEANUP CRASHED! IOError: selector is closed with celluloid-redis nio4r v0.4.6 produces a segfault. For running the example use bundle && bundle exec ruby app.rb

app.rb

require 'logger'
require 'celluloid/autostart'
require 'celluloid/io'
require 'celluloid/redis'

class RedisActor
  include Celluloid::IO

  def initialize(host, channel_name)
    @host = host
    @channel_name = channel_name
    @redis = ::Redis.new host: @host, driver: :celluloid
    @logger = ::Logger.new(STDOUT)
    async.subscribe_to_channel
  end

  def subscribe_to_channel
    begin
      @redis.subscribe(@channel_name) do |on|

        on.subscribe do |channel, subscriptions|
          @logger.info "subscribed to ##{channel}"
        end

        on.message do |_,m|
          @logger.info "received message"
        end

        on.unsubscribe do |channel, subscriptions|
          @logger.info "unsubscribed from ##{channel}"
        end

      end
    rescue ::Redis::BaseConnectionError => error
      @logger.info "#{error}, retrying in 1s."
      sleep 1
      retry
    end
  end
end

class AppGroup < Celluloid::SupervisionGroup
  supervise RedisActor, args: ['localhost', 'some_channel']
end

AppGroup.run

Gemfile

source 'http://rubygems.org'

gem 'nio4r', github: 'celluloid/nio4r', branch: 'master'
gem 'celluloid-io'
gem 'celluloid-redis'