Hola, estamos corriendo en la pila de cedro de Heroku con Unicorn y Sidekiq. Recibimos intermitentemente los siguientes errores.

BurnThis ActiveRecord::StatementInvalid: PG::UnableToSend: SSL SYSCALL error: EOF detected

ActiveRecord::StatementInvalid: PG::ConnectionBad: PQconsumeInput() SSL SYSCALL error: Connection timed out

¿Alguien tiene alguna idea de cuál es la causa directa de estos errores? ¿Son demasiadas conexiones a nuestra base de datos? Ya tenemos nuestra horquilla configurada de la siguiente manera:

unicorn.rb

worker_processes Integer(ENV["WEB_CONCURRENCY"] || 3)
timeout 30
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!
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

  # other setup
  if defined?(ActiveRecord::Base)
    config = Rails.application.config.database_configuration[Rails.env]
    config['adapter'] = 'postgis'
    config['pool']              = ENV['DB_POOL'] || 5
    config['reaping_frequency'] = ENV['DB_REAP_FREQ'] || 10 # seconds
    ActiveRecord::Base.establish_connection(config)
  end
end

Y sidekiq.rb

Sidekiq.configure_server do |config|
  config.redis = { :url => ENV['REDIS_URL'], :namespace => 'btsidekiq' }

  if defined?(ActiveRecord::Base)
    config = Rails.application.config.database_configuration[Rails.env]
    config['adapter'] = 'postgis'
    config['pool']              = ENV['DB_POOL'] || 5
    config['reaping_frequency'] = ENV['DB_REAP_FREQ'] || 10 # seconds
    ActiveRecord::Base.establish_connection(config)
  end
end

Sidekiq.configure_client do |config|
  config.redis = { :url => ENV['REDIS_URL'], :namespace => 'btsidekiq' }
end

El tamaño de nuestro grupo de bases de datos es bastante grande DB_POOL = 100 y estamos en una base de datos PG que aparentemente soporta 500 conexiones al mismo tiempo.