Shoot list is empty / Websocket issue

[petersutter]

We have seen that the shoot list on production clusters sometimes does not show any clusters. The list appears empty, even though they can be fetched directly from the kube apiserver e.g. using kubectl.
Restarting the dashboard pod solves the problem temporarily.

We have seen that this issue starts to occur with mass disconnections of websockets, e.g. when the nginx ingress controller detects a configuration change and restarts it's backends.

I could reproduce the issue locally and websockets/ws#1617 (comment) is a pretty good description of what I saw in the debugger. The issue seems to be solved with ws 7.1.2.

There is already a PR on engine.io to upgrade to ws 7.1.2

[grolu]

socket.io 2.3.0 has been released 5 days ago. Can you verify that the fix is included and solves the issue @petersutter

[petersutter]

The fix is part of engine.io 3.4.0.
But the socket.io release contains engine.io 3.3.1 -> so no, unfortunately not yet within the latest socket.io release

[grolu]

still no new release as of today

[grolu]

re-checked, actually engine.io 3.4.0 is part of socket.io 2.3 so updating the dependency will solve the issue. @petersutter will take care.