Jupyter kernel cannot be interrupted

[markolenik]

Description

When sending code from jupyter-vim to a jupyter kernel, the kernel execution cannot be manually interrupted (e.g. by pressing Ctrl-C in the qtconsole). The only way to interrupt kernel is to restart it.

Reproduce bug

To replicate run the infinite loop below and try interrupting the kernel with Ctrl-C in the qtconsole

import time
while True: 
    print('----------------')
    time.sleep(0.5)

Versions

I have the following setup

• nvim: 0.5.0
• jupyter core: 4.5.0
• qtconsole: 4.3.1
• jupyter client: 5.2.4

[wmvanvliet]

ah, good catch! Maybe this should be fixed on the QtConsole end. Having jupyter-vim have an interrupt kernel command is certainly possible, not would not be my first choice for an elegant solution. It's more intuitive for QtConsole to interrupt the kernel.

[markolenik]

The same bug occurs with jupyter console. I've submitted an issue to QtConsole: jupyter/qtconsole#410

[wmvanvliet]

Great, thanks! We'll follow it up there.

[ilkerhk]

I understand that this is a jupyter bug and it should be solved in jupyter side.
However, in qtconsole it is possible to interrupt a running code if it is not coming from a remote connection. So, it is possible that this bug might not be a high priority for jupyter team.

On the other hand, in jupyter-vim, the only way to interrupt a running code is to kill the kernel. I think, this makes jupyter-vim unusable for many users such as me.
Otherwise, this is a very nice plugin.