启动Rails服务器时出现JRuby加载错误求助

问题背景 #

将Ruby版本更新至3.1.3后，持续遇到JRuby加载失败的错误，降级回3.1.2问题依旧。已尝试重装Ruby、更新所有gems，此前无需单独安装JRuby即可正常运行。

错误信息 #

20:23:24 web.1  | C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:17:in `require': cannot load such file -- jruby (LoadError)
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:17:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/jruby-openssl-0.9.4/lib/jopenssl/load.rb:13:in `<main>'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/jruby-openssl-0.9.4/lib/openssl.rb:1:in `<main>'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/activesupport-7.0.4/lib/active_support/key_generator.rb:4:in `<main>'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/application.rb:6:in `<main>'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails.rb:13:in `<main>'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:24 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/commands/server/server_command.rb:5:in `<main>'
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/command/behavior.rb:44:in `block (2 levels) in lookup'
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/command/behavior.rb:40:in `each'        
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/command/behavior.rb:40:in `block in lookup'
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/command/behavior.rb:39:in `each'        
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/command/behavior.rb:39:in `lookup'      
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/command.rb:73:in `find_by_namespace'    
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/command.rb:46:in `invoke'
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/railties-7.0.4/lib/rails/commands.rb:18:in `<main>'
20:23:25 web.1  |       from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_requ        from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/foreman-0.87.2/lib/foreman/vendor/thor/lib/thor/base.rb:444:in `start'
        from C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/foreman-0.87.2/bin/foreman:7:in `<top (required)>'        from C:/Ruby31-x64/bin/foreman:32:in `load'
        from C:/Ruby31-x64/bin/foreman:32:in `<main>'

排查与解决步骤 #

从错误栈可以看出，问题根源是jruby-openssl这个gem——它是专为JRuby设计的，标准Ruby（MRI）完全不需要该gem，现在它被错误加载，导致系统尝试寻找不存在的jruby库。

• 卸载jruby-openssl
  打开命令行执行：

  gem uninstall jruby-openssl
  

  如果使用Bundler管理依赖，需检查Gemfile和Gemfile.lock，删除jruby-openssl相关条目，再执行：

  bundle install
  

• 清理Bootsnap缓存
  Bootsnap会缓存加载路径，残留的旧缓存可能导致问题，执行：

  bundle exec bootsnap clear
  

  或手动删除项目内的tmp/cache目录。

• 彻底清理gem缓存并重装依赖
  执行以下命令：

  gem cleanup
  bundle install --clean
  

• 检查环境配置
  查看系统环境变量（如Windows系统/用户变量）、项目初始化脚本（如.env、config/initializers下的文件），确认是否有强制加载jruby相关配置，如有则删除。

内容的提问来源于stack exchange，提问作者xor