When I worked with some ML-based text evaluation I had run across an output limit rate on the notebooks output rate:
iopub_data_rate_limit : (bytes/sec) Maximum rate at which stream output can be sent on iopub before they are limited.
I had changed it by a factor of 10 from the standard value in a file ~/.jupyter/jupyter_notebook_config.py
in my home-directory on my Linux system. When starting Jupyterlab I get error messages of the kind:
‘iopub_data_rate_limit’ has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release
and in turn
ServerApp.iopub_data_rate_limit config is deprecated in 2.0. Use ZMQChannelsWebsocketConnection.iopub_data_rate_limit.
The correction is easy. You first must create a personal configuration file for the jupyter-server. This can be done easily. At the CLI of a terminal move to the main directory of your virtual Python environment. Activate it by the usual “source bin/activate“. Then request
jupyter server --generate-config
The configuration file will then be created as ~/.jupyter/jupyter_server_config.py. Edit the file, uncomment and change the setting for the named parameter “ZMQChannelsWeb…… E.g. raise the value by a factor of 10. That is all. Your Jupyterlab will afterward start without the quoted error messages.
See also the documentation here.