Is it possible to hide active running kernels?

[vambavaram]

Our extension is built on top of the vscode jupyter extension and we provide a custom collection of remote kernels:

When we run a notebook after connecting to a new kernel, the active connection shows up in the "select a kernel" dropdown list. Each notebook needs to be tied to it's own kernel instance. So if 5 notebooks have connected to 5 kernels, those kernels all appear in the dropdown list. Is it possible to hide them?

[DonJayamanne]

If you're using the Jupyter extension API, then its upto the extension author to notify the Jupyter extension about what connections are no longer valid.

• Trigger the onDidChangeServers event so Jupyter extension will see that there's a change
• In the provideJupyterServers ensure the older/invalid servers are no longer returned.

If in your case all notebooks connect to the same server, but each has their own kernel, and you want to just hide all kernels except one, then the only way i guess is to modify your server implementation to not return the live Kernel sessions.

TLDR there's no way to do this via the Jupyter Extension API nor the UI today.

btw, what extension are you using that provides these kernels? Is it the Synapse Extension?