PyCharm PyDev调试器持续连接无输出，寻求解决方案

Hey there, sorry to hear you're stuck with this stubborn PyDev debugger connection issue—those can be such a headache! You’ve already tried the common troubleshooting steps, so let’s dive into some less obvious fixes that might get things working again:

• Check if the debugger port is occupied
  PyDev typically uses port 5678 by default, and other processes might be hogging it. To verify:

  • On Mac/Linux: Run lsof -i :5678 in the terminal to see which process is using the port. Kill it with kill <PID> if needed.
  • On Windows: Run netstat -ano | findstr :5678 to find the process ID, then use Task Manager to end that process.
    Alternatively, change the debugger port in PyCharm: Go to Run/Debug Configurations → Your debug profile → Debugger tab → Modify the Port value (e.g., 5679) and try again.

• Reset PyCharm's cache directory
  Corrupted cache files can cause weird debugging glitches. Here’s how to fix it:

  1. Close PyCharm completely.
  2. Locate the cache folder:
     • Windows: C:\Users\<YourUsername>\.PyCharm<Version>\system\caches
     • Mac: ~/Library/Caches/JetBrains/PyCharm<Version>
     • Linux: ~/.cache/JetBrains/PyCharm<Version>
  3. Delete the entire caches folder, then restart PyCharm.

• Reconfigure your Python interpreter
  A misconfigured or corrupted interpreter might be the culprit. Try these steps:

  • Go to File → Settings → Project: <YourProjectName> → Python Interpreter.
  • Click the gear icon → Add and re-select your Python installation or virtual environment.
  • Also, run your script directly in the terminal (outside PyCharm) to confirm it executes normally—this rules out issues with the script itself.

• Disable third-party plugins
  Some plugins can conflict with the PyDev debugger. Test this by launching PyCharm in Safe Mode (hold the Shift key while starting the app). If debugging works in Safe Mode, enable your plugins one by one to identify the problematic one, then update or remove it.

• Update or downgrade PyCharm
  This issue might be a bug specific to your current PyCharm version:

  • If you recently updated, try downgrading to a previous stable release that worked for you.
  • If you’re on an older version, upgrade to the latest official release to see if the bug has been fixed.

• Manually specify the debugger script path
  Sometimes PyCharm fails to locate the correct PyDev debugger files. Fix this by:

  • Going to File → Settings → Build, Execution, Deployment → Debugger → Python Debugger.
  • Checking Use custom debugger script, then navigating to the pydevd-pycharm.egg file in your PyCharm installation directory (e.g., /Applications/PyCharm.app/Contents/plugins/python/helpers/debug-eggs/pydevd-pycharm.egg on Mac).

内容的提问来源于stack exchange，提问作者gies0r