■本番環境でRailsの起動ができない。

Question

前提・実現したいこと

本番環境でrailsの起動コマンド
bundle exec unicorn_rails -c config/unicorn.rb -E production
を実行したときにエラーが出る。

おそらく、ありもしないファイルを読み込もうとしている。
モデルのuser.rbは存在するが、users.rbはどこを指しているのかわからないので、分かる方はよろしくお願いします。

使用しているのは
RDSとEC2です。

---

これまでのプロセス

gitからpull
gemを bundle install
DBをcreate&migrate
済みです。
それに関するエラーは発生していません。

発生している問題・エラーメッセージ

I, [2020-03-09T03:11:03.714215 #16063]  INFO -- : Refreshing Gem list
/home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:33:in `require': No such file to load -- users.rb (LoadError)
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `block in require'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:378:in `block in require_or_load'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:37:in `block in load_interlock'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies/interlock.rb:14:in `block in loading'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/concurrency/share_lock.rb:151:in `exclusive'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies/interlock.rb:13:in `loading'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:37:in `load_interlock'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:356:in `require_or_load'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/active_support.rb:48:in `block in require_or_load'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/active_support.rb:16:in `allow_bootsnap_retry'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/active_support.rb:47:in `require_or_load'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:334:in `depend_on'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/active_support.rb:85:in `depend_on'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:246:in `require_dependency'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:478:in `block (2 levels) in eager_load!'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:477:in `each'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:477:in `block in eager_load!'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:475:in `each'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:475:in `eager_load!'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:356:in `eager_load!'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/application/finisher.rb:69:in `each'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/initializable.rb:32:in `instance_exec'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/initializable.rb:32:in `run'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/initializable.rb:61:in `block in run_initializers'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/2.5.0/tsort.rb:228:in `block in tsort_each'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/2.5.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/2.5.0/tsort.rb:431:in `each_strongly_connected_component_from'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/2.5.0/tsort.rb:349:in `block in each_strongly_connected_component'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/2.5.0/tsort.rb:347:in `each'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/2.5.0/tsort.rb:347:in `call'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/2.5.0/tsort.rb:347:in `each_strongly_connected_component'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/2.5.0/tsort.rb:226:in `tsort_each'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/2.5.0/tsort.rb:205:in `tsort_each'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/initializable.rb:60:in `run_initializers'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/application.rb:361:in `initialize!'
        from /var/www/review-app/config/environment.rb:5:in `<top (required)>'
        from config.ru:4:in `require_relative'
        from config.ru:4:in `block in <main>'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/rack-2.2.2/lib/rack/builder.rb:125:in `instance_eval'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/rack-2.2.2/lib/rack/builder.rb:125:in `initialize'
        from config.ru:1:in `new'
        from config.ru:1:in `<main>'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/unicorn-5.4.1/lib/unicorn.rb:56:in `eval'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/unicorn-5.4.1/lib/unicorn.rb:56:in `block in builder'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/unicorn-5.4.1/bin/unicorn_rails:139:in `block in rails_builder'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/unicorn-5.4.1/lib/unicorn/http_server.rb:795:in `build_app!'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/unicorn-5.4.1/lib/unicorn/http_server.rb:139:in `start'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/unicorn-5.4.1/bin/unicorn_rails:209:in `<top (required)>'
        from /home/ec2-user/.rbenv/versions/2.5.1/bin/unicorn_rails:23:in `load'
        from /home/ec2-user/.rbenv/versions/2.5.1/bin/unicorn_rails:23:in `<main>'

該当のソースコード

/home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:33:in `require': No such file to load -- users.rb (LoadError)

試したこと

users.rbファイルを作成したりしたが、同様のエラー。
モデルにusers.rbに名前を変更したり、新規に作成したりしたが、同じエラー。

Answer 1

users.rb自体はbootsnapというgemが欲しているようですが、細かいことはそれ以上わからないですね....

似たような症状なので、試しにbootsnapのせいでrailsコマンドが動かない場合についての記事を引っ張ってきましたが、こちらの対策はいかがでしょう？
bootsnapのせいでRails5.2とかが動かない人へ

他に何か怪しい情報みたいなものはないでしょうか？
たとえば、developmentモードなら起動できるとか、あとはなんでしょうね....

Comments

[APIapp]

貼っていただいたリンクのページで
LoadError: cannot load such file -- arel
"当たり前ですが、arelが見つからないなんてことはないんです。"

本当にその通りだと思い、探した結果
無駄に作っていたusers.rbを発見しました。
localでは問題なくても本番環境で無駄に作っていた中身が空のファイルを読み込み、エラーが発生してしまうという繊細さ。

回答いただきありがとうございました！
siruku6さんも無駄なファイルが存在するケースだといいのですが。
とにかく、エラー文全体は気にせずに
LoadError: cannot load such file -- arel　←ここだけ
に焦点を当てれば解決するのではないかなと思います。

[siruku6]

解決してよかったです！

本番環境は本当に繊細で困りますね...
何となく動いてしまって、気づいたらいつの間にかエラーを吐いている、というのよりはいいのかもしれませんが