执行ng serve -o命令时出现ngcc进程已运行错误（ID：14828）

Hey there, I’ve run into this exact ngcc conflict before—super frustrating when you’re trying to fire up your Angular app! Let’s fix this step by step:

• Terminate the conflicting ngcc process

  • On Windows: Open Task Manager, locate the process with PID 14828, right-click it and select "End Task". Alternatively, run this command in Command Prompt/PowerShell:

    taskkill /F /PID 14828
    

  • On Mac/Linux: Open your terminal and run this command to force-kill the process:

    kill -9 14828
    

• Clear Angular and package manager caches

  • First, clean your npm/yarn cache to remove any stale lock files:

    npm cache clean --force
    # Or if you use yarn:
    yarn cache clean
    

  • Then clear Angular's local cache (works for Angular CLI 12+):

    ng cache clean
    

  • If the above doesn't work, you can manually delete the .angular/cache folder inside your project's node_modules directory.

• Restart your Angular app

  • Now run your start command again:

    ng serve -o
    

A quick tip to prevent this in the future: Always use Ctrl+C to properly terminate your ng serve process before closing the terminal window—this ensures ngcc exits cleanly instead of leaving orphaned processes behind.

内容的提问来源于stack exchange，提问作者Pasan Mahesha