Shut down results in errors in vscode jupyter notebook

[Fred-Wu]

I am running dtale from a vscode jupyter notebook on my MacOS M1 .

When I tried to shutdown an instance, the following error appeared in both cell output or browser no matter whether open_browser was set true or not.

Internal Server Error

Error:

500 Internal Server Error: The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.

Stacktrace:

Traceback (most recent call last):
  File "/opt/homebrew/Caskroom/miniforge/base/envs/tensor-macos/lib/python3.11/site-packages/flask/app.py", line 2529, in wsgi_app
    response = self.full_dispatch_request()
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Caskroom/miniforge/base/envs/tensor-macos/lib/python3.11/site-packages/flask/app.py", line 1825, in full_dispatch_request
    rv = self.handle_user_exception(e)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Caskroom/miniforge/base/envs/tensor-macos/lib/python3.11/site-packages/flask/app.py", line 1823, in full_dispatch_request
    rv = self.dispatch_request()
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Caskroom/miniforge/base/envs/tensor-macos/lib/python3.11/site-packages/flask/app.py", line 1799, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Caskroom/miniforge/base/envs/tensor-macos/lib/python3.11/site-packages/dtale/app.py", line 440, in shutdown
    shutdown_server()
  File "/opt/homebrew/Caskroom/miniforge/base/envs/tensor-macos/lib/python3.11/site-packages/dtale/app.py", line 426, in shutdown_server
    raise RuntimeError("Not running with the Werkzeug Server")
RuntimeError: Not running with the Werkzeug Server

[aschonfeld]

@Fred-Wu how was D-Tale started in your notebook? Did you use JUPYTER_SERVER_PROXY?

[Fred-Wu]

I am just using it through standard jupyter notebook in vscode, no specific server setting was made.

Then shutting down results in

[aschonfeld]

@Fred-Wu so I found the issue. Looks like the latest versions of Werkzeug have deprecated the werkzeug.server.shutdown function (as described here)

I'm going to continue digging to see if there is a different way to kill the server, but for now I think it should get killed when you end the jupyter notebook.

[aschonfeld]

@Fred-Wu I've fixed this issue in v3.5.0 of D-Tale. It's available on pypi and conda-forge. Let me know if you have any issues.

Also, if you haven't already, please put your ⭐ on the repo when you get a sec. Thanks! 🙏