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bug#49355: [guix-jupyter] timeout issue running the kernel

From: Domagoj Stolfa
Subject: bug#49355: [guix-jupyter] timeout issue running the kernel
Date: Sat, 3 Jul 2021 16:30:36 +0100


I've been trying to set up a Jupyter environment with the Guix kernel inside a
guix environment using:

`guix environment --ad-hoc guix-jupyter jupyter -- jupyter notebook`.

Jupyter starts up fine, but when I create an empty notebook with the Guix kernel
it spams Nudge messages in the console, followed by a crash:

[W 16:25:40.117 NotebookApp] Nudge: attempt 120 on kernel 
[E 16:25:40.479 NotebookApp] Uncaught exception GET 
    HTTPServerRequest(protocol='http', host='localhost:8888', method='GET', 
 version='HTTP/1.1', remote_ip='')
    Traceback (most recent call last):
 line 956, in _accept_connection
        await open_result
    tornado.util.TimeoutError: Timeout

Attempting to run anything in the notebook such as

`;;guix environment matplotlib-env <- python-ipykernel python-numpy 

simply does nothing. I'm not sure if this is an issue with me misconfiguring
something or if it's actually a bug, but I haven't been able to chase it down
as I don't really understand the internals of Jupyter all that well.

Adding `python-ipykernel` and using a Python kernel works fine.


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