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platform: redhat x64, installed ipython notebook 3.0 through pyvenv-3.4
When I open a notebook, it always shows "kernel starting, please wait...". But I can open IPython console.
Please help, thanks!
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You can restart your Jupyter Kernel by simply clicking Kernel > Restart from the Jupyter menu. Note: This will reset your notebook and remove all variables or methods you've defined! Sometimes you'll notice that your notebook is still hanging after you've restart the kernel. If this occurs try refreshing your browser.
NOTE: You can also shutdown a Jupyter Notebook session by clicking in the Terminal window and clicking Ctrl+c . You will be asked to confirm that you want to Shutdown this notebook server (y/[n])? . Type y and hit Enter to confirm. Then, you can close the Terminal by typing the command exit and hitting Enter .
I had this problem on multiple systems, and changing/updating browser solved it (as already written by OP).
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I meet this error message just now on ipython/jupyter notebook 4.0
And it turns out to by ad block plugin(for me is ublock)
This is probably due to this bug with the uBlock extension blocking WebSockets: gorhill/uBlock#1604
Deactivating uBlock on notebook page resolved it for me, solusion maybe same to other ad block plugin.
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