Can't stop jupyter lab with jupyter lab stop when having cert file.

[krassowski]

Manually migrated from jupyterlab/jupyterlab#12980 - during the triage meeting we though that this is most likely a server issue. CC @tjc0726

Description

can't stop jupyter lab with jupyter lab stop when having cert file.

Reproduce

edit /home/USERNAME/.jupyter/jupyter_notebook_config.py with:

c.NotebookApp.certfile = '//fullchain.pem'
c.NotebookApp.keyfile = '//privkey.pem'
c.NotebookApp.ip = '*'
c.NotebookApp.open_browser = False
c.NotebookApp.port = 9999

then

nohup jupyter lab &

then jupyter lab stop

it'll fail with

[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, certificate is not valid for 'localhost'. (_ssl.c:997)

Context

• Operating System and version: Ubuntu 22.04.1
• JupyterLab version: 3.4.4

Command Line Output

ubuntu@VM-4-8-ubuntu:~$ jupyter lab stop
Shutting down server on 8888...
SSL Error on 9 ('127.0.0.1', 8888): [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, certificate is not valid for 'localhost'. (_ssl.c:997)
Traceback (most recent call last):
  File "/home/ubuntu/.local/bin/jupyter-lab", line 8, in 
    sys.exit(main())
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_server/extension/application.py", line 594, in launch_instance
    serverapp.start()
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_server/serverapp.py", line 2814, in start
    self.start_app()
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_server/serverapp.py", line 2710, in start_app
    super().start()
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_core/application.py", line 258, in start
    self.subapp.start()
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_server/serverapp.py", line 608, in start
    self._shutdown_or_exit(port, server)
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_server/serverapp.py", line 583, in _shutdown_or_exit
    if not self.shutdown_server(server):
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_server/serverapp.py", line 579, in shutdown_server
    return shutdown_server(server, log=self.log)
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_server/serverapp.py", line 516, in shutdown_server
    raise ex
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_server/serverapp.py", line 508, in shutdown_server
    fetch(
  File "/home/ubuntu/.local/lib/python3.10/site-packages/jupyter_server/utils.py", line 352, in fetch
    response = HTTPClient(AsyncHTTPClient).fetch(request)
  File "/home/ubuntu/.local/lib/python3.10/site-packages/tornado/httpclient.py", line 134, in fetch
    response = self._io_loop.run_sync(
  File "/home/ubuntu/.local/lib/python3.10/site-packages/tornado/ioloop.py", line 529, in run_sync
    return future_cell[0].result()
  File "/home/ubuntu/.local/lib/python3.10/site-packages/tornado/simple_httpclient.py", line 340, in run
    stream = await self.tcp_client.connect(
  File "/home/ubuntu/.local/lib/python3.10/site-packages/tornado/tcpclient.py", line 288, in connect
    stream = await stream.start_tls(
  File "/home/ubuntu/.local/lib/python3.10/site-packages/tornado/iostream.py", line 1389, in _do_ssl_handshake
    self.socket.do_handshake()
  File "/usr/lib/python3.10/ssl.py", line 1341, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, certificate is not valid for 'localhost'. (_ssl.c:997)