在分階段啟動Rails App時出錯-Unicorn

Question

因此，我剛剛將Rails 4應用程序部署到運行Nginx + Unicorn的AWS EC2實例。 我認為在Unicorn端一切都運行良好，因為請求正在觸及Rails應用程序，但是我遇到了這個奇怪的500錯誤，無法確定它來自何處。

這是我從staging.log獲得的信息。 我不知道發生了什么事，任何幫助都會很大。

I, [2014-05-25T05:11:29.460247 #21589]  INFO -- : Started GET "/" for <ip> at 2014-05-25 05:11:29 +0000
I, [2014-05-25T05:11:29.483476 #21589]  INFO -- : Processing by PlaybookController#index as HTML
I, [2014-05-25T05:11:29.486810 #21589]  INFO -- : Completed 500 Internal Server Error in 3ms
F, [2014-05-25T05:11:29.491919 #21589] FATAL -- :
TypeError (no implicit conversion of Array into String):
  activesupport (4.1.1) lib/active_support/key_generator.rb:21:in `pbkdf2_hmac_sha1'
  activesupport (4.1.1) lib/active_support/key_generator.rb:21:in `generate_key'
  activesupport (4.1.1) lib/active_support/key_generator.rb:38:in `generate_key'
  actionpack (4.1.1) lib/action_dispatch/middleware/cookies.rb:509:in `initialize'
  actionpack (4.1.1) lib/action_dispatch/middleware/cookies.rb:160:in `new'
  actionpack (4.1.1) lib/action_dispatch/middleware/cookies.rb:160:in `encrypted'
  actionpack (4.1.1) lib/action_dispatch/middleware/cookies.rb:169:in `signed_or_encrypted'
  actionpack (4.1.1) lib/action_dispatch/middleware/session/cookie_store.rb:119:in `cookie_jar'
  actionpack (4.1.1) lib/action_dispatch/middleware/session/cookie_store.rb:114:in `get_cookie'
  actionpack (4.1.1) lib/action_dispatch/middleware/session/cookie_store.rb:90:in `block in unpacked_cookie_data'
  actionpack (4.1.1) lib/action_dispatch/middleware/session/abstract_store.rb:51:in `stale_session_check!'
  actionpack (4.1.1) lib/action_dispatch/middleware/session/cookie_store.rb:89:in `unpacked_cookie_data'
  actionpack (4.1.1) lib/action_dispatch/middleware/session/cookie_store.rb:83:in `block in extract_session_id'
  actionpack (4.1.1) lib/action_dispatch/middleware/session/abstract_store.rb:51:in `stale_session_check!'
  actionpack (4.1.1) lib/action_dispatch/middleware/session/cookie_store.rb:82:in `extract_session_id'
  actionpack (4.1.1) lib/action_dispatch/request/session.rb:49:in `block in []'
  actionpack (4.1.1) lib/action_dispatch/request/session.rb:48:in `fetch'
  actionpack (4.1.1) lib/action_dispatch/request/session.rb:48:in `[]'
  actionpack (4.1.1) lib/action_dispatch/request/session.rb:70:in `id'
  rack (1.5.2) lib/rack/session/abstract/id.rb:282:in `current_session_id'
  rack (1.5.2) lib/rack/session/abstract/id.rb:288:in `session_exists?'
  actionpack (4.1.1) lib/action_dispatch/request/session.rb:152:in `exists?'
  actionpack (4.1.1) lib/action_dispatch/request/session.rb:172:in `load_for_read!'
  actionpack (4.1.1) lib/action_dispatch/request/session.rb:89:in `[]'
  turbolinks (2.2.2) lib/turbolinks/xhr_headers.rb:35:in `set_xhr_redirected_to'
  activesupport (4.1.1) lib/active_support/callbacks.rb:424:in `block in make_lambda'
  activesupport (4.1.1) lib/active_support/callbacks.rb:160:in `call'
  activesupport (4.1.1) lib/active_support/callbacks.rb:160:in `block in halting'
  activesupport (4.1.1) lib/active_support/callbacks.rb:166:in `call'
  activesupport (4.1.1) lib/active_support/callbacks.rb:166:in `block in halting'
  activesupport (4.1.1) lib/active_support/callbacks.rb:86:in `call'
  activesupport (4.1.1) lib/active_support/callbacks.rb:86:in `run_callbacks'
  actionpack (4.1.1) lib/abstract_controller/callbacks.rb:19:in `process_action'
  actionpack (4.1.1) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (4.1.1) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
  activesupport (4.1.1) lib/active_support/notifications.rb:159:in `block in instrument'
  activesupport (4.1.1) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.1.1) lib/active_support/notifications.rb:159:in `instrument'
  actionpack (4.1.1) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
  actionpack (4.1.1) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
  activerecord (4.1.1) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
 actionpack (4.1.1) lib/abstract_controller/base.rb:136:in `process'
 actionview (4.1.1) lib/action_view/rendering.rb:30:in `process'
 actionpack (4.1.1) lib/action_controller/metal.rb:195:in `dispatch'
 actionpack (4.1.1) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
 actionpack (4.1.1) lib/action_controller/metal.rb:231:in `block in action'
 actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:80:in `call'
 actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:80:in `dispatch'
 actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:48:in `call' "../../log/staging.log" [readonly] 960L, 73078C                                                                                                                                                                              
 activesupport (4.1.1) lib/active_support/notifications.rb:159:in `instrument'
 actionpack (4.1.1) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
 actionpack (4.1.1) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
 activerecord (4.1.1) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
 actionpack (4.1.1) lib/abstract_controller/base.rb:136:in `process'
 actionview (4.1.1) lib/action_view/rendering.rb:30:in `process'
 actionpack (4.1.1) lib/action_controller/metal.rb:195:in `dispatch'
 actionpack (4.1.1) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
 actionpack (4.1.1) lib/action_controller/metal.rb:231:in `block in action'
 actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:80:in `call'
 actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:80:in `dispatch'
 actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:48:in `call'
 actionpack (4.1.1) lib/action_dispatch/journey/router.rb:71:in `block in call'
 actionpack (4.1.1) lib/action_dispatch/journey/router.rb:59:in `each'
 actionpack (4.1.1) lib/action_dispatch/journey/router.rb:59:in `call'
 actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:676:in `call'
 rack (1.5.2) lib/rack/etag.rb:23:in `call'
 rack (1.5.2) lib/rack/conditionalget.rb:25:in `call'
 rack (1.5.2) lib/rack/head.rb:11:in `call'
 actionpack (4.1.1) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
 actionpack (4.1.1) lib/action_dispatch/middleware/flash.rb:254:in `call'
 rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context'
 rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call'
 actionpack (4.1.1) lib/action_dispatch/middleware/cookies.rb:560:in `call'
 activerecord (4.1.1) lib/active_record/query_cache.rb:36:in `call'
 activerecord (4.1.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call'
 actionpack (4.1.1) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
 activesupport (4.1.1) lib/active_support/callbacks.rb:82:in `run_callbacks'
 actionpack (4.1.1) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
 actionpack (4.1.1) lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
 actionpack (4.1.1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
 actionpack (4.1.1) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
 railties (4.1.1) lib/rails/rack/logger.rb:38:in `call_app'
 railties (4.1.1) lib/rails/rack/logger.rb:20:in `block in call'
 activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in `block in tagged'
 activesupport (4.1.1) lib/active_support/tagged_logging.rb:26:in `tagged'
 activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in `tagged'
 railties (4.1.1) lib/rails/rack/logger.rb:20:in `call'
 actionpack (4.1.1) lib/action_dispatch/middleware/request_id.rb:21:in `call'
 rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
 rack (1.5.2) lib/rack/runtime.rb:17:in `call'
 activesupport (4.1.1) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
 rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
 railties (4.1.1) lib/rails/engine.rb:514:in `call'
 railties (4.1.1) lib/rails/application.rb:144:in `call'
 unicorn (4.8.3) lib/unicorn/http_server.rb:576:in `process_client'
 unicorn (4.8.3) lib/unicorn/http_server.rb:670:in `worker_loop'
 unicorn (4.8.3) lib/unicorn/http_server.rb:525:in `spawn_missing_workers'
 unicorn (4.8.3) lib/unicorn/http_server.rb:140:in `start'
 unicorn (4.8.3) bin/unicorn_rails:209:in `<top (required)>'
 /var/www/playbook/current/bin/unicorn_rails:16:in `load'
 /var/www/playbook/current/bin/unicorn_rails:16:in `<main>'

Answer 1

我不是Ruby專家。 但是在錯誤日志中像這樣的回溯轉儲也會使我發瘋。 關鍵是看一下前幾行：

I, [2014-05-25T05:11:29.460247 #21589]  INFO -- : Started GET "/" for <ip> at 2014-05-25 05:11:29 +0000
I, [2014-05-25T05:11:29.483476 #21589]  INFO -- : Processing by PlaybookController#index as HTML
I, [2014-05-25T05:11:29.486810 #21589]  INFO -- : Completed 500 Internal Server Error in 3ms
F, [2014-05-25T05:11:29.491919 #21589] FATAL -- :
TypeError (no implicit conversion of Array into String):

500錯誤表示存在內部服務器錯誤。 這意味着您的代碼中有什么問題（無論是PHP，Perl還是Ruby）都在完全殺死服務器。 我在這里看到的關鍵是：

TypeError (no implicit conversion of Array into String):

在Ruby代碼中的某個地方，您試圖將數組分配為字符串。 這就是殺死整個過程的原因。 哪里？ 不確定是否要查看日志。 但這是整個事情失敗的關鍵。 轉儲的其余部分基本上是對支持您的應用程序的所有已加載項目（庫等）的報告。

Answer 2

我在同一個地方遇到了類似的錯誤： TypeError (no implicit conversion of Fixnum into String) 。 這是由於我在config / secrets.yml中設置了一個純數字的secret_key_base。 也許您Yaml中的該屬性被解釋為數組？

格式應為：

staging:
  secret_key_base: 61a6fa38260a0fdfecac5c088aadd91e87

當然，不要只是復制/粘貼上面的內容，因為每個人都會知道您的秘密，那將是不安全的。