AWS unicornが起動できない　`normalize_name': undefined method `empty?'

前提・実現したいこと

railsで開発したアプリをAWSのEC2インスタンスにgithubからcloneし、unicornを起動しようとしたのですが、エラーで前に進めません。

発生している問題・エラーメッセージ

実行したコマンド

unicorn_rails -c config/unicorn.rb -E production -D

エラーメッセージ

master failed to start, check stderr log for details

該当のソースコード

$ less log/unicorn.stderr.log 

I, [2019-07-01T10:35:58.307919 #3303]  INFO -- : Refreshing Gem list
/home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/lookup_context.rb:206:in `normalize_name': undefined method `empty?' for nil:NilClass (NoMethodError)
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/lookup_context.rb:155:in `args_for_lookup'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/lookup_context.rb:116:in `find'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/renderer/abstract_renderer.rb:20:in `find_template'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/renderer/template_renderer.rb:40:in `determine_template'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/renderer/template_renderer.rb:10:in `render'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/renderer/renderer.rb:44:in `render_template'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/renderer/renderer.rb:25:in `render'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/rendering.rb:103:in `_render_template'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionpack-5.2.3/lib/action_controller/metal/streaming.rb:219:in `_render_template'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionview-5.2.3/lib/action_view/rendering.rb:84:in `render_to_body'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionpack-5.2.3/lib/action_controller/metal/rendering.rb:52:in `render_to_body'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionpack-5.2.3/lib/action_controller/metal/renderers.rb:142:in `render_to_body'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionpack-5.2.3/lib/abstract_controller/rendering.rb:46:in `render_to_string'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionpack-5.2.3/lib/action_controller/metal/rendering.rb:41:in `render_to_string'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionpack-5.2.3/lib/action_controller/renderer.rb:83:in `render'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/actionpack-5.2.3/lib/action_controller/metal/rendering.rb:11:in `render'
        from /var/www/DepositManagement/app/controllers/users/sessions_controller.rb:4:in `<class:SessionsController>'
        from /var/www/DepositManagement/app/controllers/users/sessions_controller.rb:3:in `<top (required)>'
        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/kernel_require.rb:22:in `require'
        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/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
        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/loaded_features_index.rb:92:in `register'
        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/kernel_require.rb:21:in `require_with_bootsnap_lfi'
        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/kernel_require.rb:30: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:291:in `block in require'


　　　　　（中略）


        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/DepositManagement/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-2.0.7/lib/rack/builder.rb:55:in `instance_eval'
        from /home/ec2-user/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/rack-2.0.7/lib/rack/builder.rb:55: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>'

　

config/unicorn.rb

app_path = File.expand_path('../../', __FILE__)

worker_processes 1

working_directory app_path
listen 3000
pid "#{app_path}/tmp/pids/unicorn.pid"
stderr_path "#{app_path}/log/unicorn.stderr.log"
stdout_path "#{app_path}/log/unicorn.stdout.log"

timeout 60

preload_app true
GC.respond_to?(:copy_on_write_friendly=) && GC.copy_on_write_friendly = true

check_client_connection false

run_once = true

before_fork do |server, worker|
  defined?(ActiveRecord::Base) &&
    ActiveRecord::Base.connection.disconnect!

  if run_once
    run_once = false # prevent from firing again
  end

  old_pid = "#{server.config[:pid]}.oldbin"
  if File.exist?(old_pid) && server.pid != old_pid
    begin
      sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
      Process.kill(sig, File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH => e
      logger.error e
    end
  end
end

after_fork do |_server, _worker|
  defined?(ActiveRecord::Base) && ActiveRecord::Base.establish_connection
end

　
gemfile（一部抜粋）

group :production do
  gem 'unicorn', '5.4.1'
end

sessions_controller.rb

# frozen_string_literal: true

class Users::SessionsController < Devise::SessionsController
render layout: 'application'
# before_action :configure_sign_in_params, only: [:create]

# GET /resource/sign_in
# def new
# super
# end

# POST /resource/sign_in
# def create
# super
# end

# DELETE /resource/sign_out
def destroy
redirect_to new_user_session_path
super
end

# protected

# If you have extra params to permit, append them to the sanitizer.
# def configure_sign_in_params
# devise_parameter_sanitizer.permit(:sign_in, keys: [:attribute])
# end
end

試したこと

EC2インスタンス再起動
EC2インスタンス作り直し
別でデプロイしたアプリとのコード見比べ
エラー文で検索
normalize_nameで検索して出てきた記事
https://qiita.com/ngtk/items/cd406961cf62531a81c5

###github ソースコード
https://github.com/YousukeSasaki/DepositManagement

補足情報（FW/ツールのバージョンなど）

Ruby 2.5.1
Rails 5.2.3
AWS EC2 AmazonLinuxAMI t2micro

その他足りない情報がありましたらお教えください。
よろしくお願いします。

winterboum

2019/07/01 23:33

class:SessionsController に何かありそうなのですが、見せて頂けますか

YousukeSasaki

2019/07/02 03:19 編集

winterboumさんコメントありがとうございます。 sessions_controllerを追記しましたのご確認ください。 application_controllerにて`before_action :authenticate_user!`を設定しているのでdestroyアクションは必要ないですね^^; のちほど削除します。 sessions_controllerに何かありそうだと思われたのは、なぜでしょうか？

winterboum

2019/07/02 03:39

う〜〜む、、、私の実力ではわからん、、、です assets:precompile はしてますよね？　実行環境（productionかな）で

YousukeSasaki

2019/07/02 03:52

回答にも記述した通り、sessions_controller.rbの記述をコメントアウトしたところunicornを起動することができました！ありがとうございました！今後のために、原因がなぜsessions_controllerにあるとお考えになったのか、お教えいただけると助かります。m(_ _)m