ruby-on-rails - Heroku, resque, unicorn -- '[COBALT] 无法从客户端接收数据：连接被对等方重置'。

Question

任何想法是什么导致日志中出现此消息？

'[COBALT] could not receive data from client: Connection reset by peer'. 

我认为这是 before_fork/after_fork 过程之一的问题——或者仅仅是 Heroku 问题与此代码无关？

resque.rb

require 'resque/server'

ENV["REDIS_URL"] ||= "redis://localhost:6379/"

uri          = URI.parse(ENV["REDIS_URL"])
$redis       = Redis.new(host: uri.host, port: uri.port, password: uri.password)
Resque.redis = $redis

Resque.after_fork = Proc.new { ActiveRecord::Base.establish_connection }

独角兽.rb

# config/unicorn.rb
worker_processes Integer(ENV["WEB_CONCURRENCY"] || 3)
timeout 20
preload_app true

before_fork do |server, worker|

  Signal.trap 'TERM' do
    puts 'Unicorn master intercepting TERM and sending myself QUIT instead'
    Process.kill 'QUIT', Process.pid
  end

  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.connection.disconnect!

  if defined?(Resque)
    Resque.redis.quit
    Rails.logger.info('Disconnected from Redis')
  end

end

after_fork do |server, worker|

  Signal.trap 'TERM' do
    puts 'Unicorn worker intercepting TERM and doing nothing. Wait for master to send QUIT'
  end

  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.establish_connection

  if defined?(Resque)
    Resque.redis = ENV['REDIS_URL']
    Rails.logger.info('Connected to Redis')
  end

end