ruby-on-rails - Redis 尝试连接到 Heroku 上的本地主机而不是 REDIS_URL

Question

我有一个使用 Redis 进行后台作业的 Rails 应用程序。在 Heroku 上，我使用 Heroku Redis 附加组件。当我部署到 Heroku 时，它给我这个错误:

Redis::CannotConnectError: Error connecting to Redis on 127.0.0.1:6379

它似乎试图连接到本地主机。我在 Heroku 上有一个 REDIS_URL 和 REDIS_PROVIDER 环境变量。这就是我的 redis.rb 的样子:

if Rails.env.production?
  uri = URI.parse(ENV["REDIS_URL"])
else
  uri = URI.parse("redis://localhost:6379")
end
Resque.redis = Redis.new(:host => uri.host, :port => uri.port, :password => uri.password)

这是我的Procfile:

web: bundle exec unicorn -p $PORT -c ./config/unicorn.rb
worker: env TERM_CHILD=1 bundle exec rake environment resque:work QUEUE=* COUNT=1

知道为什么它不起作用吗？即使我更改 redis.rb 使其只有 REDIS_URL 作为 url，它也会给出相同的错误。

更新:添加了错误跟踪:

remote:        Redis::CannotConnectError: Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED)
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:345:in `rescue in establish_connection'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:331:in `establish_connection'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:101:in `block in connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:293:in `with_reconnect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:100:in `connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:364:in `ensure_connected'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:221:in `block in process'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:306:in `logging'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:220:in `process'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:120:in `call'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:351:in `block in time'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:58:in `block in synchronize'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:58:in `synchronize'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:350:in `time'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-namespace-1.5.3/lib/redis/namespace.rb:435:in `call_with_namespace'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-namespace-1.5.3/lib/redis/namespace.rb:321:in `method_missing'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque/data_store.rb:100:in `redis_time_available?'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque/data_store.rb:15:in `initialize'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque.rb:125:in `new'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque.rb:125:in `redis='
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-web-0.0.9/config/initializers/resque_config.rb:4:in `<top (required)>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:287:in `load'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:287:in `block in load'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:287:in `load'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:648:in `block in load_config_initializer'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:166:in `instrument'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:647:in `load_config_initializer'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:612:in `block (2 levels) in <class:Engine>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:611:in `each'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:611:in `block in <class:Engine>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:30:in `instance_exec'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:30:in `run'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:55:in `block in run_initializers'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:44:in `each'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:44:in `tsort_each_child'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:54:in `run_initializers'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/application.rb:352:in `initialize!'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/config/environment.rb:5:in `<top (required)>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `require'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `block in require'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `require'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/application.rb:328:in `require_environment!'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/application.rb:448:in `block in run_tasks_blocks'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/task.rb:62:in `block (2 levels) in define'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
remote:        Errno::ECONNREFUSED: Connection refused - connect(2) for 127.0.0.1:6379
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:206:in `rescue in connect_addrinfo'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:198:in `connect_addrinfo'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:239:in `block in connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:237:in `each'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:237:in `each_with_index'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:237:in `connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:313:in `connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:336:in `establish_connection'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:101:in `block in connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:293:in `with_reconnect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:100:in `connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:364:in `ensure_connected'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:221:in `block in process'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:306:in `logging'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:220:in `process'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:120:in `call'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:351:in `block in time'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:58:in `block in synchronize'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:58:in `synchronize'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:350:in `time'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-namespace-1.5.3/lib/redis/namespace.rb:435:in `call_with_namespace'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-namespace-1.5.3/lib/redis/namespace.rb:321:in `method_missing'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque/data_store.rb:100:in `redis_time_available?'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque/data_store.rb:15:in `initialize'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque.rb:125:in `new'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque.rb:125:in `redis='
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-web-0.0.9/config/initializers/resque_config.rb:4:in `<top (required)>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:287:in `load'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:287:in `block in load'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:287:in `load'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:648:in `block in load_config_initializer'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:166:in `instrument'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:647:in `load_config_initializer'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:612:in `block (2 levels) in <class:Engine>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:611:in `each'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:611:in `block in <class:Engine>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:30:in `instance_exec'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:30:in `run'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:55:in `block in run_initializers'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:44:in `each'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:44:in `tsort_each_child'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:54:in `run_initializers'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/application.rb:352:in `initialize!'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/config/environment.rb:5:in `<top (required)>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `require'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `block in require'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `require'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/application.rb:328:in `require_environment!'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/application.rb:448:in `block in run_tasks_blocks'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/task.rb:62:in `block (2 levels) in define'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
remote:        IO::EINPROGRESSWaitWritable: Operation now in progress - connect(2) would block
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:199:in `connect_addrinfo'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:239:in `block in connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:237:in `each'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:237:in `each_with_index'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:237:in `connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/connection/ruby.rb:313:in `connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:336:in `establish_connection'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:101:in `block in connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:293:in `with_reconnect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:100:in `connect'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:364:in `ensure_connected'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:221:in `block in process'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:306:in `logging'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:220:in `process'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis/client.rb:120:in `call'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:351:in `block in time'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:58:in `block in synchronize'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:58:in `synchronize'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-3.3.3/lib/redis.rb:350:in `time'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-namespace-1.5.3/lib/redis/namespace.rb:435:in `call_with_namespace'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/redis-namespace-1.5.3/lib/redis/namespace.rb:321:in `method_missing'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque/data_store.rb:100:in `redis_time_available?'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque/data_store.rb:15:in `initialize'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque.rb:125:in `new'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-1.27.2/lib/resque.rb:125:in `redis='
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-web-0.0.9/config/initializers/resque_config.rb:4:in `<top (required)>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:287:in `load'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:287:in `block in load'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:287:in `load'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:648:in `block in load_config_initializer'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:166:in `instrument'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:647:in `load_config_initializer'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:612:in `block (2 levels) in <class:Engine>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:611:in `each'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/engine.rb:611:in `block in <class:Engine>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:30:in `instance_exec'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:30:in `run'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:55:in `block in run_initializers'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:44:in `each'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:44:in `tsort_each_child'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/initializable.rb:54:in `run_initializers'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/application.rb:352:in `initialize!'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/config/environment.rb:5:in `<top (required)>'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `require'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `block in require'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `require'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/application.rb:328:in `require_environment!'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/railties-5.0.1/lib/rails/application.rb:448:in `block in run_tasks_blocks'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/task.rb:62:in `block (2 levels) in define'
remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
remote:        Tasks: TOP => environment
remote:        (See full trace by running task with --trace)
remote:  !
remote:  !     Precompiling assets failed.
remote:  !     Attempted to access a nonexistent database:
remote:  !     https://devcenter.heroku.com/articles/pre-provision-database
remote:  !
remote:  !     Push rejected, failed to compile Ruby app.
remote: 
remote:  !     Push failed
remote: Verifying deploy....
remote: 
remote: !   Push rejected to backbone-app-staging.
remote: 
To git@heroku.com:backbone-app-staging.git
 ! [remote rejected] rails5 -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:backbone-app-staging.git'

Answer 1

我可以想到两种可能性:

• 在初始化程序运行之前是否设置了ENV['REDIS_URL']？例如，也许您将一个 .env 文件 checkin 了覆盖 Heroku 变量的 git 中？

• 你说这段代码来自redis.rb。你也有 config/initializers/resque.rb 吗？ config/resque.yml 怎么样？其中任何一个都可能也尝试打开 Redis 连接。 (如果您可以发布错误的整个堆栈跟踪，您可以确认或排除它。)或者您是否将 Redis 用于 Resque 以外的任何用途？

您还可以进行一些 printf 调试并将您的初始化程序更改为:

if Rails.env.production?
  puts "production: #{ENV['REDIS_URL']}"
  uri = URI.parse(ENV["REDIS_URL"])
else
  puts "not production"
  uri = URI.parse("redis://localhost:6379")
end

这应该可以帮助您弄清楚发生了什么。 (您可能需要使用 Rails.logger.info 而不是 puts。)

编辑:堆栈跟踪非常有用!果然，你自己的初始化器根本不在里面，但是还有其他代码试图加载它自己的 redis 连接，这里:

remote:        /tmp/build_329306a238b046dda86a54d29db48f4c/vendor/bundle/ruby/2.4.0/gems/resque-web-0.0.9/config/initializers/resque_config.rb:4:in `<top (required)>'

如果你look up that gem ，你可以看到它是这样做的:

require 'resque'

config = ENV.fetch("RAILS_RESQUE_REDIS", "127.0.0.1:6379")
Resque.redis = config

所以我认为答案是将RAILS_RESQUE_REDIS 另外设置为REDIS_URL。您可以使用 Heroku config:set 命令来执行此操作。