Websocket pings not happening

[rti...@broadinstitute.org]

Hello,

I'm running Jupyter behind a reverse proxy. I noticed in the UI that the kernel would periodically get killed and recreated, and found it was due to the proxy killing idle websocket connections. I increased the proxy's idle timeout and the errors went away.

However I did some research and found that Jupyter SHOULD be sending periodic pings to keep websockets alive, based on this code anyway: https://github.com/jupyter/notebook/blob/master/notebook/base/zmqhandlers.py#L88

This doesn't seem to be happening in our case. I tried playing with the `ws_ping_interval` setting but it doesn't seem to have any effect. Any ideas why websocket pings wouldn't be happening, or how to debug this further? I'm running Jupyter 4.4.0 FWIW.

Thanks,

Rob

[Thomas Kluyver]

Hi Rob,

Not sure what could have caused that, but it's plausible that we broke it without noticing at some point. Do you want to open an issue on jupyter/notebook to reduce the chance that it gets forgotten?

Thomas

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