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kevin-bates
alusiani
nrbeaton
JohanMabille
krassowski
Zsailer
Description
I had a working setup using jupyter-server 1.12.1, in which jupyter lab was working with Python, R, and Julia kernels. I just checked today that when just updating in this setup jupyter-server from 1.12.1 to 1.13.0 makes jupyter lab fail with timeout when connecting to the R and Julia kernels. Python works.
Reproduce
R and Julia notebooks do not even start on jupyter lab.
Expected behavior
R and Julia notebooks should work on jupyter lab.
Context
Troubleshoot Output
$PATH: /home/alusiani/local/bin /home/alusiani/.local/bin /home/alusiani/.cargo/bin /home/alusiani/local/share/perl5/bin /usr/local/bin /usr/bin /bin /usr/local/sbin /usr/sbin sys.path: /home/alusiani/.local/bin /usr/lib64/python39.zip /usr/lib64/python3.9 /usr/lib64/python3.9/lib-dynload /home/alusiani/.local/lib/python3.9/site-packages /usr/lib64/python3.9/site-packages /usr/lib/python3.9/site-packages sys.executable: /usr/bin/python3 sys.version: 3.9.9 (main, Nov 19 2021, 00:00:00) [GCC 11.2.1 20210728 (Red Hat 11.2.1-1)] platform.platform(): Linux-5.15.6-100.fc34.x86_64-x86_64-with-glibc2.33 which -a jupyter: /home/alusiani/.local/bin/jupyter /usr/bin/jupyter /bin/jupyter pip list: Package Version ----------------------------- ---------------------- adjustText 0.7.3 aiohttp 3.8.1 aiosignal 1.2.0 alabaster 0.7.12 anyio 3.4.0 appdirs 1.4.4 argcomplete 1.12.0 argon2-cffi 21.1.0 astroid 2.8.4 async-generator 1.10 async-timeout 4.0.1 attrs 21.2.0 awkward 1.7.0 awkward0 0.15.5 Babel 2.9.1 backcall 0.2.0 beautifulsoup4 4.9.3 bleach 4.1.0 blinker 1.4 blivet 3.3.3 blivet-gui 2.3.0 Bottleneck 1.2.1 cachetools 4.2.4 certifi 2021.10.8 cffi 1.15.0 chardet 4.0.0 charset-normalizer 2.0.9 click 8.0.3 cloudpickle 2.0.0 colorama 0.4.4 crcmod 1.7 cssselect 0.9.2 cssutils 1.0.2 csv2md 1.1.2 csvtomd 0.3.0 cupshelpers 1.0 cycler 0.11.0 dasbus 1.4 dbus-python 1.2.18 debugpy 1.5.1 decorator 4.4.2 defusedxml 0.7.1 deprecation 2.1.0 distro 1.5.0 dnspython 2.1.0 docopt 0.6.2 docutils 0.17.1 doit 0.33.1 entrypoints 0.3 fett 0.3.2 ffmpeg-python 0.2.0 fonttools 4.28.3 fritzconnection 1.7.2 frozenlist 1.2.0 future 0.18.2 ghp-import 2.0.2 gnucash-utilities 0.1.5 google-api-core 2.2.2 google-api-python-client 2.32.0 google-auth 2.3.3 google-auth-httplib2 0.1.0 google-auth-oauthlib 0.4.6 googleapis-common-protos 1.53.0 gpg 1.15.1 greenlet 1.1.2 gspread 4.0.1 gspread-dataframe 3.2.2 gspread-formatting 1.0.5 gspread-pandas 2.3.1 hepdata 0.2.1 hepdata-cli 0.2.1 hepdata-lib 0.9.0 hepdata-validator 0.3.2 html-to-csv 0.1.3 html2text 2020.1.16 html5lib 1.1 httplib2 0.20.2 humanize 0.5.1 idna 3.3 imagesize 1.3.0 iminuit 2.8.4 importlib-metadata 4.8.2 initial-setup 0.3.90 ipykernel 6.6.0 ipython 7.30.1 ipython-genutils 0.2.0 ipywidgets 7.6.5 isort 5.10.1 jedi 0.18.1 Jinja2 3.0.3 JsMVA 6.24.6 json5 0.9.6 jsonschema 4.2.1 JupyROOT 6.24.6 jupyter 1.0.0 jupyter-client 7.1.0 jupyter-console 6.4.0 jupyter-core 4.9.1 jupyter-lsp 1.5.0 jupyter-packaging 0.11.1 jupyter-server 1.13.0 jupyterlab 3.2.4 jupyterlab-code-formatter 1.4.10 jupyterlab-pygments 0.1.2 jupyterlab-server 2.8.2 jupyterlab-widgets 1.0.2 jupytext 1.13.3 kiwisolver 1.3.2 langtable 0.0.56 lazy-object-proxy 1.6.0 libcomps 0.1.18 livereload 2.6.3 lxml 4.6.3 Mako 1.1.6 Markdown 3.3.6 markdown-it-py 1.1.0 MarkupSafe 2.0.1 matplotlib 3.5.0 matplotlib-inline 0.1.3 mccabe 0.6.1 mdit-py-plugins 0.3.0 mdurl 0.1.0 meson 0.59.4 metakernel 0.28.2 mistune 0.8.3 multidict 5.2.0 mutagen 1.45.1 natsort 8.0.0 nbclassic 0.3.4 nbclient 0.5.9 nbconvert 6.3.0 nbformat 5.1.3 nest-asyncio 1.5.4 netifaces 0.10.6 networkx 2.6.3 nftables 0.1 Nikola 8.1.3 notebook 6.4.6 numexpr 2.7.1 numpy 1.21.4 oauthlib 3.1.1 olefile 0.46 openpaperwork-core 2.0.3 openpaperwork-gtk 2.0.3 packaging 21.3 pandas 1.3.4 pandas-datareader 0.9.0 pandocfilters 1.5.0 paperwork 2.0.3 paperwork-backend 2.0.3 parso 0.8.3 pexpect 4.8.0 pickleshare 0.7.5 pid 2.2.3 piecash 1.2.0 piexif 1.1.3 Pillow 8.4.0 pip 21.0.1 platformdirs 2.4.0 ply 3.11 prettytable 2.4.0 productmd 1.33 prometheus-client 0.12.0 prompt-toolkit 3.0.23 protobuf 3.19.1 psutil 5.8.0 ptyprocess 0.7.0 pwquality 1.4.4 pyasn1 0.4.8 pyasn1-modules 0.2.8 pycairo 1.20.1 pycountry 20.7.3 pycparser 2.21 pycups 2.0.1 pycurl 7.43.0.6 pyenchant 3.2.1 Pygments 2.10.0 PyGObject 3.40.1 pyinotify 0.9.6 pyinspire 0.3.0 pykickstart 3.32 pymongo 3.12.2 pyocr 0.8 pyparsing 3.0.6 pyparted 3.11.7 pypillowfight 0.3.0 PyQt5 5.15.0 PyQt5-sip 4.19.24 pyrsistent 0.18.0 PyRSS2Gen 1.1 PySocks 1.7.1 python-augeas 0.5.0 python-dateutil 2.8.2 python-gettext 4.0 python-json-logger 2.0.2 python-jsonrpc-server 0.3.4 python-Levenshtein 0.12.0 python-manatools 0.0.3 python-meh 0.50 pytz 2021.3 pytz-deprecation-shim 0.1.0.post0 pyudev 0.22.0 pyxdg 0.27 PyYAML 5.4.1 pyzmq 22.3.0 qtconsole 5.2.1 QtPy 1.11.3 r128gain 1.0.4 regex 2021.10.23 requests 2.26.0 requests-file 1.5.1 requests-ftp 0.3.1 requests-oauthlib 1.3.0 requests-unixsocket 0.2.0 ROOT 6.24.6 rpm 4.16.1.3 rsa 4.8 rstcheck 3.3.1 scipy 1.7.3 scour 0.38.1 seaborn 0.11.2 selinux 3.2 Send2Trash 1.8.0 sepolicy 3.2 setools 4.4.0 setproctitle 1.1.10 setroubleshoot 1.1 setuptools 59.4.0 setuptools-scm 6.3.2 Shredder 2.10.1.Ludicrous.Lemur simpleaudio 1.0.4 simplebayes 1.5.8 simpleline 1.8 six 1.16.0 slip 0.6.4 slip.dbus 0.6.4 sniffio 1.2.0 snooty-lextudio 1.11.5 snowballstemmer 2.2.0 sos 4.1 soupsieve 2.2 Sphinx 4.3.1 sphinx-autobuild 2021.3.14 sphinxcontrib-applehelp 1.0.2 sphinxcontrib-devhelp 1.0.2 sphinxcontrib-htmlhelp 2.0.0 sphinxcontrib-jsmath 1.0.1 sphinxcontrib-qthelp 1.0.3 sphinxcontrib-serializinghtml 1.1.5 sphynx 0.0.3 SQLAlchemy 1.3.24 SQLAlchemy-Utils 0.37.9 sshuttle 1.0.5 structlog 21.4.0 systemd-python 234 tables 3.6.1 terminado 0.12.1 testpath 0.5.0 tikzplotlib 0.9.16 toml 0.10.2 tomli 1.2.2 tomlkit 0.7.2 tornado 6.1 tqdm 4.62.3 traitlets 5.1.1 typing-extensions 4.0.1 tzdata 2021.5 tzlocal 4.1 ujson 1.35 uncertainties 3.1.6 Unidecode 1.3.2 uproot 4.1.8 uproot3 3.14.4 uproot3-methods 0.10.1 uritemplate 4.1.1 urllib3 1.26.7 watchdog 1.0.2 wcwidth 0.2.5 webencodings 0.5.1 websocket-client 1.2.1 wheel 0.37.0 Whoosh 2.7.4 widgetsnbextension 3.5.2 wrapt 1.13.3 xlrd 2.0.1 xlwt 1.3.0 xmltodict 0.12.0 Yapsy 1.12.2 yarl 1.7.2 youtube-dl 2021.6.6 zipp 3.6.0Command Line Output
/home/alusiani/.local/lib/python3.9/site-packages/jupyter_lsp/types.py:193: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead. nodejs = Unicode(help=_("path to nodejs executable")).tag(config=True) /home/alusiani/.local/lib/python3.9/site-packages/jupyter_lsp/types.py:195: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead. node_roots = List_([], help=_("absolute paths in which to seek node_modules")).tag( /home/alusiani/.local/lib/python3.9/site-packages/jupyter_lsp/types.py:200: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead. [], help=_("additional absolute paths to seek node_modules first") /home/alusiani/.local/lib/python3.9/site-packages/jupyter_lsp/manager.py:41: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead. help=_("extra language server specs, keyed by implementation, from conf.d"), /home/alusiani/.local/lib/python3.9/site-packages/jupyter_lsp/manager.py:46: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead. help=_("a dict of language server specs, keyed by implementation"), /home/alusiani/.local/lib/python3.9/site-packages/jupyter_lsp/manager.py:52: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead. True, help=_("try to find known language servers in sys.prefix (and elsewhere)") [I 2021-12-08 12:26:18.485 ServerApp] jupyter_lsp | extension was successfully linked. [I 2021-12-08 12:26:18.494 ServerApp] jupyterlab | extension was successfully linked. [I 2021-12-08 12:26:18.494 ServerApp] jupyterlab_code_formatter | extension was successfully linked. [I 2021-12-08 12:26:18.494 ServerApp] jupytext | extension was successfully linked. /home/alusiani/.jupyter/jupyter_notebook_config.py:784: UserWarning: Directory /home/lusiani/.julia/packages/WebIO/nTMDV/deps could not be found; WebIO.jl will not work as expected. Make sure WebIO.jl is installed correctly (try running Pkg.add("WebIO") and Pkg.build("WebIO") from the Julia console to make sure it is). warnings.warn(warning_msg) [W 2021-12-08 12:26:18.497 NotebookApp] 'extra_static_paths' was found in both NotebookApp and ServerApp. This is likely a recent change. This config will only be set in NotebookApp. Please check if you should also config these traits in ServerApp for your purpose. [W 2021-12-08 12:26:18.497 NotebookApp] 'port' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release. [W 2021-12-08 12:26:18.497 NotebookApp] 'port' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release. [I 2021-12-08 12:26:18.667 ServerApp] nbclassic | extension was successfully linked. [I 2021-12-08 12:26:18.690 ServerApp] nbclassic | extension was successfully loaded. /home/alusiani/.local/lib/python3.9/site-packages/jupyter_lsp/manager.py:279: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead. _("Skipped non-installed server(s): {}").format( [I 2021-12-08 12:26:18.964 ServerApp] Skipped non-installed server(s): bash-language-server, dockerfile-language-server-nodejs, javascript-typescript-langserver, jedi-language-server, julia-language-server, pyright, python-language-server, python-lsp-server, sql-language-server, texlab, typescript-language-server, unified-language-server, vscode-css-languageserver-bin, vscode-html-languageserver-bin, vscode-json-languageserver-bin, yaml-language-server [I 2021-12-08 12:26:19.033 ServerApp] jupyter_lsp | extension was successfully loaded. [I 2021-12-08 12:26:19.034 LabApp] JupyterLab extension loaded from /home/alusiani/.local/lib/python3.9/site-packages/jupyterlab [I 2021-12-08 12:26:19.034 LabApp] JupyterLab application directory is /home/alusiani/.local/share/jupyter/lab [I 2021-12-08 12:26:19.036 ServerApp] jupyterlab | extension was successfully loaded. [I 2021-12-08 12:26:19.037 ServerApp] jupyterlab_code_formatter | extension was successfully loaded. [I 2021-12-08 12:26:19.037 ServerApp] [Jupytext Server Extension] Deriving a JupytextContentsManager from LargeFileManager [I 2021-12-08 12:26:19.038 ServerApp] jupytext | extension was successfully loaded. [I 2021-12-08 12:26:19.038 ServerApp] Serving notebooks from local directory: /home/alusiani/nb [I 2021-12-08 12:26:19.038 ServerApp] Jupyter Server 1.13.0 is running at: [I 2021-12-08 12:26:19.038 ServerApp] http://localhost:20088/lab?token=b63602a2a5eee33535d7f6acd7edea97bf5d52ffc0d49d74 [I 2021-12-08 12:26:19.038 ServerApp] or http://127.0.0.1:20088/lab?token=b63602a2a5eee33535d7f6acd7edea97bf5d52ffc0d49d74 [I 2021-12-08 12:26:19.038 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation). [C 2021-12-08 12:26:19.056 ServerApp] To access the server, open this file in a browser: file:///home/alusiani/.local/share/jupyter/runtime/jpserver-27610-open.html Or copy and paste one of these URLs: http://localhost:20088/lab?token=b63602a2a5eee33535d7f6acd7edea97bf5d52ffc0d49d74 or http://127.0.0.1:20088/lab?token=b63602a2a5eee33535d7f6acd7edea97bf5d52ffc0d49d74 [I 2021-12-08 12:26:23.047 LabApp] Build is up to date [I 2021-12-08 12:26:25.838 ServerApp] Loading Jupytext configuration file at /home/alusiani/.config/jupytext/jupytext.toml [I 2021-12-08 12:26:34.924 ServerApp] Creating new notebook in /gminus2 [I 2021-12-08 12:26:34.924 ServerApp] Loading Jupytext configuration file at /home/alusiani/.config/jupytext/jupytext.toml [I 2021-12-08 12:26:34.927 ServerApp] Loading Jupytext configuration file at /home/alusiani/.config/jupytext/jupytext.toml [I 2021-12-08 12:26:34.929 ServerApp] Saving Untitled.ipynb [I 2021-12-08 12:26:34.974 ServerApp] Saving Untitled.md [I 2021-12-08 12:26:34.998 ServerApp] Loading Jupytext configuration file at /home/alusiani/.config/jupytext/jupytext.toml [I 2021-12-08 12:26:35.029 ServerApp] Loading Jupytext configuration file at /home/alusiani/.config/jupytext/jupytext.toml [I 2021-12-08 12:26:35.041 ServerApp] Reading SOURCE from gminus2/Untitled.md [I 2021-12-08 12:26:39.472 ServerApp] Kernel started: 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:44.433 ServerApp] Nudge: attempt 10 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:44.435 ServerApp] Nudge: attempt 10 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:44.446 ServerApp] Nudge: attempt 10 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:49.452 ServerApp] Nudge: attempt 20 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:49.454 ServerApp] Nudge: attempt 20 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:49.463 ServerApp] Nudge: attempt 20 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:54.473 ServerApp] Nudge: attempt 30 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:54.474 ServerApp] Nudge: attempt 30 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:54.475 ServerApp] Nudge: attempt 30 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:59.493 ServerApp] Nudge: attempt 40 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:59.495 ServerApp] Nudge: attempt 40 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:26:59.496 ServerApp] Nudge: attempt 40 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:04.517 ServerApp] Nudge: attempt 50 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:04.518 ServerApp] Nudge: attempt 50 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:04.520 ServerApp] Nudge: attempt 50 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:09.537 ServerApp] Nudge: attempt 60 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:09.539 ServerApp] Nudge: attempt 60 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:09.540 ServerApp] Nudge: attempt 60 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:14.558 ServerApp] Nudge: attempt 70 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:14.560 ServerApp] Nudge: attempt 70 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:14.560 ServerApp] Nudge: attempt 70 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:19.579 ServerApp] Nudge: attempt 80 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:19.580 ServerApp] Nudge: attempt 80 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:19.581 ServerApp] Nudge: attempt 80 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:24.599 ServerApp] Nudge: attempt 90 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:24.601 ServerApp] Nudge: attempt 90 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:24.602 ServerApp] Nudge: attempt 90 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:29.620 ServerApp] Nudge: attempt 100 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:29.620 ServerApp] Nudge: attempt 100 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:29.622 ServerApp] Nudge: attempt 100 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:34.640 ServerApp] Nudge: attempt 110 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:34.641 ServerApp] Nudge: attempt 110 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:34.642 ServerApp] Nudge: attempt 110 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:39.658 ServerApp] Nudge: attempt 120 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:39.659 ServerApp] Nudge: attempt 120 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [W 2021-12-08 12:27:39.660 ServerApp] Nudge: attempt 120 on kernel 2def8c66-5327-4b0a-88e4-3524fbd11e44 [E 2021-12-08 12:27:39.917 ServerApp] Uncaught exception GET /api/kernels/2def8c66-5327-4b0a-88e4-3524fbd11e44/channels?session_id=ab16a636-1b48-46b7-b609-f5a1f6e97a61 (::1) HTTPServerRequest(protocol='http', host='localhost:20088', method='GET', uri='/api/kernels/2def8c66-5327-4b0a-88e4-3524fbd11e44/channels?session_id=ab16a636-1b48-46b7-b609-f5a1f6e97a61', version='HTTP/1.1', remote_ip='::1') Traceback (most recent call last): File "/home/alusiani/.local/lib/python3.9/site-packages/tornado/websocket.py", line 956, in _accept_connection await open_result tornado.util.TimeoutError: Timeout [E 2021-12-08 12:27:39.921 ServerApp] Uncaught exception GET /api/kernels/2def8c66-5327-4b0a-88e4-3524fbd11e44/channels?session_id=42f0bc7e-9a44-4c8c-b30a-d55e7f337f97 (127.0.0.1) HTTPServerRequest(protocol='http', host='localhost:20088', method='GET', uri='/api/kernels/2def8c66-5327-4b0a-88e4-3524fbd11e44/channels?session_id=42f0bc7e-9a44-4c8c-b30a-d55e7f337f97', version='HTTP/1.1', remote_ip='127.0.0.1') Traceback (most recent call last): File "/home/alusiani/.local/lib/python3.9/site-packages/tornado/websocket.py", line 956, in _accept_connection await open_result tornado.util.TimeoutError: Timeout [E 2021-12-08 12:27:39.931 ServerApp] Uncaught exception GET /api/kernels/2def8c66-5327-4b0a-88e4-3524fbd11e44/channels?session_id=d8880a8e-0798-473d-8bd4-5fb7a61951b5 (::1) HTTPServerRequest(protocol='http', host='localhost:20088', method='GET', uri='/api/kernels/2def8c66-5327-4b0a-88e4-3524fbd11e44/channels?session_id=d8880a8e-0798-473d-8bd4-5fb7a61951b5', version='HTTP/1.1', remote_ip='::1') Traceback (most recent call last): File "/home/alusiani/.local/lib/python3.9/site-packages/tornado/websocket.py", line 956, in _accept_connection await open_result tornado.util.TimeoutError: Timeout [W 2021-12-08 12:27:39.961 ServerApp] Replacing stale connection: 2def8c66-5327-4b0a-88e4-3524fbd11e44:ab16a636-1b48-46b7-b609-f5a1f6e97a61 [W 2021-12-08 12:27:40.267 ServerApp] Replacing stale connection: 2def8c66-5327-4b0a-88e4-3524fbd11e44:42f0bc7e-9a44-4c8c-b30a-d55e7f337f97Browser Output