无法加载此类文件-exception_notificationLoadError

分类：编程问答

如何解决无法加载此类文件-exception_notificationLoadError

我正在尝试将异常发送到闲置频道。这是我的设置：

在我的Gemfile

中添加了以下内容 
gem 'exception_notification'
gem 'slack-notifier'

创建了一个新的初始化器config/initializers/errors.rb 

# Works in development with or without this require
require 'exception_notification'

Rails.application.config.middleware.use(
    ExceptionNotification::Rack,:slack => {
        :webhook_url => ENV["SLACK_ERROR_WEBHOOOK_URL"]
    }
)

我重建了docker镜像并删除了gem缓存卷。

这在我的开发环境中正常工作（错误发送到松弛状态），但是在我的生产服务器上不起作用。我能想到的两者之间唯一真正的区别是RAILS_ENV值，至少是在配置方面。但是，对于Rails以及部署到生产环境我还是很陌生。

在启动应用程序（docker-compose up）之后，它立即退出并显示以下错误：

/usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:34:in `require': cannot load such file -- exception_notification (LoadError)
app_1           |   from /usr/local/bundle/gems/zeitwerk-2.3.0/lib/zeitwerk/kernel.rb:23:in `require'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `block in require'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:291:in `load_dependency'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `require'
app_1           |   from /app/config/initializers/errors.rb:1:in `<main>'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:55:in `load'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:55:in `load'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:319:in `block in load'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:291:in `load_dependency'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:319:in `load'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/engine.rb:667:in `block in load_config_initializer'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/notifications.rb:182:in `instrument'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/engine.rb:666:in `load_config_initializer'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/engine.rb:624:in `block (2 levels) in <class:Engine>'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/engine.rb:623:in `each'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/engine.rb:623:in `block in <class:Engine>'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/initializable.rb:32:in `instance_exec'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/initializable.rb:32:in `run'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/initializable.rb:61:in `block in run_initializers'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:422:in `block (2 levels) in each_strongly_connected_component_from'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:421:in `block in each_strongly_connected_component_from'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/initializable.rb:50:in `each'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/initializable.rb:50:in `tsort_each_child'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:415:in `call'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:415:in `each_strongly_connected_component_from'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:347:in `each'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:347:in `call'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
app_1           |   from /usr/local/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/initializable.rb:60:in `run_initializers'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/application.rb:363:in `initialize!'
app_1           |   from /app/config/environment.rb:5:in `<main>'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
app_1           |   from /usr/local/bundle/gems/zeitwerk-2.3.0/lib/zeitwerk/kernel.rb:23:in `require'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `block in require'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:291:in `load_dependency'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `require'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:49:in `require_relative'
app_1           |   from config.ru:3:in `block in <main>'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/builder.rb:116:in `eval'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/builder.rb:116:in `new_from_string'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/builder.rb:105:in `load_file'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/builder.rb:66:in `parse_file'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/server.rb:349:in `build_app_and_options_from_config'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/server.rb:249:in `app'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/server.rb:422:in `wrapped_app'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/server.rb:312:in `block in start'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/server.rb:379:in `handle_profiling'
app_1           |   from /usr/local/bundle/gems/rack-2.2.2/lib/rack/server.rb:311:in `start'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/commands/server/server_command.rb:39:in `start'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/commands/server/server_command.rb:147:in `block in perform'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/commands/server/server_command.rb:138:in `tap'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/commands/server/server_command.rb:138:in `perform'
app_1           |   from /usr/local/bundle/gems/thor-1.0.1/lib/thor/command.rb:27:in `run'
app_1           |   from /usr/local/bundle/gems/thor-1.0.1/lib/thor/invocation.rb:127:in `invoke_command'
app_1           |   from /usr/local/bundle/gems/thor-1.0.1/lib/thor.rb:392:in `dispatch'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/command/base.rb:69:in `perform'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/command.rb:46:in `invoke'
app_1           |   from /usr/local/bundle/gems/railties-6.0.2.1/lib/rails/commands.rb:18:in `<main>'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
app_1           |   from /usr/local/bundle/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `block in require'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:291:in `load_dependency'
app_1           |   from /usr/local/bundle/gems/activesupport-6.0.2.1/lib/active_support/dependencies.rb:325:in `require'
app_1           |   from bin/rails:4:in `<main>'

我已通过运行exception_notification（它在输出中包含docker exec -it <container-name> gem list）并运行exception_notification (4.4.3)（它给出了{{1 }}

运行Ruby on Rails v6.0.2和Ruby v2.6.3

解决方法

在使用Rails和Docker时，我遇到了一些类似的问题。 Bootsnap缓存可能已过时。

尝试删除缓存

rm tmp/cache/bootsnap-load-path-cache

您也可以尝试重新启动Spring

spring stop

它应该自动重启。

,

尝试require 'exception_notification/rails'

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