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Re: ipython/jupyter issue [Was: RuntimeError: Kernel died before replying to kernel_info (#4116)]

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On 09/11/17 15:27, Andreas Tille wrote:
> Hi,
> 
> statsmodels upstream claims that #880245 is a ipython/jupyter issue.
> 
> Is there anybody with some knowledge and knows how to fix this issue?

I just built statsmodels 0.8.0-6 in and amd64 sbuild chroot without
encountering this issue.

Looking at the trace in #880245, it looks like the key error is

    zmq.error.ZMQError: Address already in use

and the other

    RuntimeError: Kernel died before replying to kernel_info

are just caused by the other process not being able to communicate. My
guess is that this is an environment heisenbug - container network
issues/socket exhaustion...

It might be possible to get `ExecutePreprocessor` in
`tools/nbgenerate.py` to use IPC instead of TCP transport, which might
be more reliable for this sort of use (although it probably doesn't get
tested as much, so might have its own problems); this is a supported
option when invoking some CLI tools (eg, `jupyter console --transport
ipc --kernel python3`), but it's not obvious to me how to do it in this
case.

Gordon

> 
> Kind regards
> 
>        Andreas.
> 
> ----- Forwarded message from Josef Perktold <notifications@github.com> -----
> 
> Date: Thu, 09 Nov 2017 12:51:38 +0000 (UTC)
> From: Josef Perktold <notifications@github.com>
> To: statsmodels/statsmodels <statsmodels@noreply.github.com>
> Cc: Andreas Tille <tille@debian.org>, Author <author@noreply.github.com>
> Subject: Re: [statsmodels/statsmodels] RuntimeError: Kernel died before replying to kernel_info (#4116)
> 
> This is a ipython/jupyter issue, and not related to statsmodels. You can ask at their issue tracker.
> 

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Bug#880245: ipython/jupyter issue [Was: RuntimeError: Kernel died before replying to kernel_info (#4116)] Andreas Tille <andreas@an3as.eu> - 2017-11-09 15:40 +0100
  Re: ipython/jupyter issue [Was: RuntimeError: Kernel died before  replying to kernel_info (#4116)] Gordon Ball <gordon@chronitis.net> - 2017-11-09 20:50 +0100
    Re: ipython/jupyter issue [Was: RuntimeError: Kernel died before  replying to kernel_info (#4116)] Andreas Tille <andreas@an3as.eu> - 2017-11-10 17:30 +0100
      Re: ipython/jupyter issue [Was: RuntimeError: Kernel died before  replying to kernel_info (#4116)] Gordon Ball <gordon@chronitis.net> - 2017-11-12 22:20 +0100

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