我正在3000上启动服务器，并且它总是引导两个工作程序。我杀死了pid，然后弹出了新的pid。
我已经尝试过lsof，杀死pid，甚至运行服务器父级杀手程序。
=> Booting Puma
=> Rails 5.1.6.1 application starting in development
=> Run `rails server -h` for more startup options
[23820] Puma starting in cluster mode...
[23820] * Version 3.9.1 (ruby 2.3.4-p301), codename: Private Caller
[23820] * Min threads: 5, max threads: 5
[23820] * Environment: development
[23820] * Process workers: 2
[23820] * Preloading application
[23820] * Listening on tcp://0.0.0.0:3000
[23820] Use Ctrl-C to stop
[23820] - Worker 0 (pid: 23982) booted, phase: 0
[23820] - Worker 1 (pid: 23983) booted, phase: 0