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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6The reason turned out to be an obsolete firefox version. I updated firefox and it worked. Case closed. – XWen Mar 15 '15 at 14:46
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This was very helpful, thank you for posting this comment! I also ran into this issue with firefox 37.0.1 and Jupyter 3.0.0 – Alex Apr 15 '15 at 18:16
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thanks for your question and this comment! – DenisFLASH Aug 06 '15 at 05:04
4 Answers
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I had this problem on multiple systems, and changing/updating browser solved it (as already written by OP).
Marta Cz-C
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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.
Mithril
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I had the same problem right now on my Linux machine and up to date browser and even with a disabled uBlock. I was port-forwarding from a remote machine to my laptop while running Jupyter on the remote machine. Logging out of the ssh port-forwarding session (went to htop and killed the process) helped.
blehblehblecksheep
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For me, the issue was caused by ExpressVPN's whitelist (split-tunnel) feature interfering with Jupyter. I disabled split-tunnel and just used a browser VPN extension instead. FYI, NordVPN has a vaguely working split-tunnel feature whereas SurfShark, ExpressVPN and probably many others are complete fails.
BSalita
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