Korzystam teraz z udostępnionego planu postgres (dev / free) na Heroku i widzę ten błąd w moich dziennikach na przyzwoitą kwotę. Łączenie się z bazą danych PG zwykle jednak działa, więc nie jestem pewien, czy jest to coś, co jest pod moją kontrolą. Strona statusu Heroku nie wyświetla żadnych przestojów dla udostępnionych baz danych, gdy takie występują.

Korzystanie z Rails 3.1.1 iserwer internetowy Unicorn.

Błąd: nie mógł przetłumaczyć nazwy hosta „pg60.sharedpg.heroku.com (http://pg60.sharedpg.heroku.com) ”na adres: nieznana nazwa lub usługa (PG :: Błąd)

MójJednorożec plik konfiguracyjny (po obejrzeniu zalecanych ustawień Unicorn in Heroku):

worker_processes 3 # amount of unicorn workers to spin up
timeout 30         # restarts workers that hang for 30 seconds
preload_app true

before_fork do |server, worker|
  # Replace with MongoDB or whatever
  if defined?(ActiveRecord::Base)
    ActiveRecord::Base.connection_handler.clear_all_connections!
    ActiveRecord::Base.connection.disconnect!
    Rails.logger.info('Disconnected from ActiveRecord')
  end

  # If you are using Redis but not Resque, change this
  if defined?(Resque)
    Resque.redis.quit
    Rails.logger.info('Disconnected from Redis')
  end
end

after_fork do |server, worker|
  # Replace with MongoDB or whatever
  if defined?(ActiveRecord::Base)
    ActiveRecord::Base.establish_connection
    ActiveRecord::Base.connection_handler.verify_active_connections!
    Rails.logger.info('Connected to ActiveRecord')
  end

  # If you are using Redis but not Resque, change this
  if defined?(Resque)
    Resque.redis = ENV['REDIS_URI']
    Rails.logger.info('Connected to Redis')
  end
end

Ślad:

 328 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:1032:in `initialize': could not translate host name "pg60.sharedpg.heroku.com (http://pg60.sharedpg.heroku.com)" to address: Name or service not known (PG::Error)
219 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:1032:in `new'
223 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:1032:in `connect'
225 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:301:in `initialize'
217 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `new'
235 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `postgresql_connection'

328 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:1032:in `initialize': could not translate host name "pg60.sharedpg.heroku.com (http://pg60.sharedpg.heroku.com)" to address: Name or service not known (PG::Error)
219 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:1032:in `new'
223 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:1032:in `connect'
225 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:301:in `initialize'
217 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `new'
235 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `postgresql_connection'
235 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:304:in `new_connection'
244 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:323:in `checkout_new_connection'
249 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block (2 levels) in checkout'
225 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:261:in `loop'
238 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:261:in `block in checkout'
153 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /usr/local/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
229 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:260:in `checkout'
231 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:162:in `connection'
240 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:409:in `retrieve_connection'
249 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:107:in `retrieve_connection'
239 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in `connection'
194 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/base.rb:703:in `table_exists?'
128 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/app.rb:38:in `<top (required)>'
116 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from config.ru:9 (http://config.ru:9):in `require'
124 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from config.ru:9 (http://config.ru:9):in `block in <main>'
179 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval'
176 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize'
112 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from config.ru:1 (http://config.ru:1):in `new'
115 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from config.ru:1 (http://config.ru:1):in `<main>'
168 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/lib/unicorn.rb:44:in `eval'
180 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/lib/unicorn.rb:44:in `block in builder'
181 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/lib/unicorn/http_server.rb:691:in `call'
187 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/lib/unicorn/http_server.rb:691:in `build_app!'
182 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/lib/unicorn/http_server.rb:136:in `start'
178 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/bin/unicorn:121:in `<top (required)>'
146 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/bin/unicorn:19:in `load'
148 <13>1 2012-08-27T21:36:37+00:00 d.4122435c-cb44-421a-9a7d-a68bb10457d6 app web.1 (http://web.1) - - from /app/vendor/bundle/ruby/1.9.1/bin/unicorn:19:in `<main>'