TimeoutError: Timeout waiting for restart

[jmbertoncelli]

Hi,

I have a very slow computer because of the many security layers that our corporate IT did deploy and I would like to know If it could be possible to have a parameter that could be used to customize the kernel restart timeout value?

thanks in advance.

jm

[gnestor]

@Carreau Is there anything like this? Running jupyter notebook --help-all reveals:

KernelManager options
---------------------
--KernelManager.autorestart=<Bool>
    Default: True
    Should we autorestart the kernel if it dies.

We could potentially change the value from a bool to an integer to represent the number of retries or timeout in seconds...

[rgbkrk]

We run some spark-backed kernels (Toree included) that I would love to be able to increase this timeout on, similar to the jupyter console settings.

[Carreau]

I think there is some logic somewhere to delay the timeout for the first heartbeat. Not sure where. It might be in a dependency.

[rgbkrk]

It appears to not be directly configurable:

notebook/notebook/services/kernels/kernelmanager.py

Line 190 in f81fb46

timeout = loop.add_timeout(loop.time() + 30, on_timeout)

[mpacer]

This is easy to fix globally for the notebook in a simple way, but making it per kernelspec would be much more complicated.

Also, it would require a bit more work to have it be for starting and restarting (as it is for jupyter_console). I'll try to get that working