Kubectl exec exits unexpectedly

Rancher
1

Deployment: single instance deploy, version 2.0.8
kubectl config file is downloaded from rancher ui.
I exec into the pod using "kubectl exec -it /bin/sh -n ". If commands were typed continually, everything went well. But if I hang for about 10 secs then typed enter, kubectl was shut down.
If tracing tail of rancher server container log, we found this:
E1025 05:50:46.299072 7 upgradeaware.go:310] Error proxying data from client to backend: EOF

Looks communication error between rancher server and kubenetes api server. Any suggestion?

thanks.

2

Looks like restart of rancher server resolves the issue. But still trying don’t know what is causing it.

3

Not working for me. I’m still seeing this in v2.2.3. Try logout and login rancher will resolve this for a short period. But after several minutes it happened again.