How do I connect to the kernel using lldb -p <pid> without jupyter immediately restarting the kernel

[Christian Schafmeister]

When I connect to my kernel using  lldb -p <pid> to debug a crash, the jupyter notebook system immediately thinks the kernel crashed and restarts it.

Is there a jupyter notebook command line option or configuration setting that will prevent this from happening?

[Shell] top of main loop

[Shell] top of main loop

[Shell] top of main loop

[Shell] top of main loop

<STARTING lldb -p <pid> here>

[I 12:47:11.831 NotebookApp] KernelRestarter: restarting kernel (1/5)

WARNING:root:kernel 719da16d-fbe0-48ce-840f-8f9472233114 restarted

I'm implementing a new kernel for jupyter notebooks and I need to trap segfaults occasionally and this notebook restarting behavior is getting in my way.

Best,

Christian Schafmeister

Professor

Chemistry Department

Temple University

[Roland Weber]

When debugging, you could change the KernelRestarter class. I'm not sure if it's configurable, but you certainly can hack the code. It's in the jupyter_client package.

hope that helps,

  Roland

[Matthias Bussonnier]

I think you should be able to set `c.KernelRestarter.time_to_dead` to
an arbitrary large value. I don't think it allow infinity of negative
value to never consider the kernel dead, though if you are poking at
the code and want to submit a Pull-request to enable that I guess that
would be accepted.

Let us know of your experience in using LLDB to debug kernels.

Thanks,
--
Matthias

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