Jupyter-lab: The 'min_open_files_limit' trait of a ServerApp instance expected an int, not the NoneType None

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I installed jupyter notebook using: pip install jupyterlab and tried to run it using : jupyter-lab but I'm jupyter lab is not getting launched.

Command prompt is getting stuck after the following output:

[I 2021-09-21 00:20:30.717 ServerApp] jupyterlab | extension was successfully linked.

[W 2021-09-21 00:20:30.749 ServerApp] The 'min_open_files_limit' trait of a ServerApp instance expected an int, not the NoneType None.

anaconda3 jupyter-lab
1 Answers

This warning was fixed in jupyter_server v1.11.1 by #587. Please upgrade jupyter_server to get the fix:

# if you use pip:
pip install -U "jupyter_server>=1.11.1"
# or, if you use conda:
conda install -c conda-forge "jupyter_server>=1.11.1"
user_66469120
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