works in Jupyter Notebook but not in Jupyter Lab

[nrbeaton]

OS: Arch Linux
Julia version 1.7.0
Jupyter Lab version 3.2.4

I've added the IJulia package in Julia as usual.

Running jupyter notebook from the terminal, choosing the Julia kernel, and doing stuff works totally fine.

Running jupyter lab from the terminal, choosing the Julia kernel, it says "connecting" for a while and then "unknown". Trying to run something in a cell does nothing. If I try restarting the kernel it just hangs on "restarting".

Python and SageMath work fine in Jupyter Lab, it's just Julia that's failing.

If there's a log or error message somewhere that I should post then tell me how and I'll do it.

[danielwe]

What's your jupyter_server version? For me, yesterday's 1.13 release of jupyter_server broke the IJulia kernels. Rolling back to jupyter_server 1.12.1 fixed the problem. Perhaps caused by jupyter-server/jupyter_server#628?

[nrbeaton]

Yeah it's 1.13. Looks like the issue has been raised here jupyter-server/jupyter_server#633.

[nrbeaton]

This has now been fixed with jupyter-server 1.13.1.