I am running a z2jh setup with relatively vanilla config options. Everything appears to run smoothly until about 20 lines into executing any notebook, at which point the kernel crashes (see screenshot). I don’t see any obvious candidate for what’s getting in the way here. In other threads I have fo…

Looks like I’ll be able to manage this by populating singleuser.memory guarantees and limits (the latter of which is referred to as requests in k8s parlance), which default to NULL and 1GB , respectively. I’ll likely set the guarantee higher and the limit to null, which according to the k8s docs wil…

If there is an issue with websockets, your notebook would not even work in the first place. If it is happening after executing certain cells, I assume you are hitting some sort of resource constraints imposed on your single user server pod by k8s. Could you share your pod logs which should give more…

@mahendrapaipuri excellent point on ws not being a likely culprit here. Perhaps those errors are coming after the crash. I’ve replicated the crash while tailing logs and here are the relevant lines. [C 2024-09-18 15:26:00.931 ServerApp] received signal 15, stopping [I 2024-09-18 15:26:00.932 Serve…

Ok progress! tl;dr it’s a memory allocation issue I was able to watch head -3 /proc/meminfo on the singleuser pod while I was running the notebook to see the available memory slowly decrease as I worked through the notebook. Finally, I got an exit code 137, then the ssh session crashed. I then wen…

JupyterLab singleuser kernels are disconnecting due to apparent auth and web socket errors

JupyterHub Zero to JupyterHub on Kubernetes

mr_z_ro September 17, 2024, 9:11pm 2

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JupyterLab singleuser kernels are disconnecting due to apparent auth and web socket errors

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