minikube: The connection to the server 192.168.99.100:8443 was refused - did you specify the right host or port?

This is a BUG REPORT

Minikube version (use minikube version): minikube version: v0.19.0

Environment:

• OS MacOS
• VM Driver Virtualbox
• ISO version “Boot2DockerURL”: “file:///Users/tuna/.minikube/cache/iso/minikube-v0.18.0.iso”

What happened: The connection to apiserver is unstable after starting k8s

Tunas-MacBook-Pro:kubeless tuna$ kubectl get po --all-namespaces
The connection to the server 192.168.99.100:8443 was refused - did you specify the right host or port?
Tunas-MacBook-Pro:kubeless tuna$ kubectl get po --all-namespaces
NAMESPACE     NAME                                    READY     STATUS    RESTARTS   AGE
kube-system   kube-addon-manager-minikube             1/1       Running   0          7h
kube-system   kube-dns-268032401-xcw9q                3/3       Running   0          7h
kube-system   kubernetes-dashboard-68l5t              1/1       Running   0          7h
Tunas-MacBook-Pro:kubeless tuna$ kubectl get po --all-namespaces
The connection to the server 192.168.99.100:8443 was refused - did you specify the right host or port?
Tunas-MacBook-Pro:kubeless tuna$ kubectl get po --all-namespaces
NAMESPACE     NAME                                    READY     STATUS    RESTARTS   AGE
kube-system   kube-addon-manager-minikube             1/1       Running   0          7h
kube-system   kube-dns-268032401-xcw9q                3/3       Running   0          7h
kube-system   kubernetes-dashboard-68l5t              1/1       Running   0          7h
Tunas-MacBook-Pro:kubeless tuna$ kubectl get po --all-namespaces 
The connection to the server 192.168.99.100:8443 was refused - did you specify the right host or port?
Tunas-MacBook-Pro:kubeless tuna$ kubectl get po --all-namespaces 
The connection to the server 192.168.99.100:8443 was refused - did you specify the right host or port?
Tunas-MacBook-Pro:kubeless tuna$ kubectl get po --all-namespaces 
NAMESPACE     NAME                                    READY     STATUS    RESTARTS   AGE
kube-system   kube-addon-manager-minikube             1/1       Running   0          7h
kube-system   kube-dns-268032401-xcw9q                3/3       Running   0          7h
kube-system   kubernetes-dashboard-68l5t              1/1       Running   0          7h
Tunas-MacBook-Pro:kubeless tuna$ kubectl get po --all-namespaces 
The connection to the server 192.168.99.100:8443 was refused - did you specify the right host or port?

SSH-ing into minikube and see no container running, I think it ends up with on-off

$ minikube ssh
$ docker ps    
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

What you expected to happen: Stability

How to reproduce it (as minimally and precisely as possible):

$ minikube start
$ kubectl get po --all-namespaces

Anything else do we need to know: It’s not happening all the time. Sometime it works and sometime it doesn’t. But I’ve never seen this issue with the minikube v0.17.x or older