aws-ebs-csi-driver: RegisterPlugin error -- failed to get plugin info using RPC GetInfo at socket /var/lib/kubelet/plugins/ebs.csi.aws.com/csi.sock

/kind bug

What happened?

All cluster nodes have the following lines in the kubelet log:

Nov 06 20:55:06 nodename kubelet[776]: I1106 20:55:06.366541     776 operation_generator.go:193] parsed scheme: ""
Nov 06 20:55:06 nodename kubelet[776]: I1106 20:55:06.366580     776 operation_generator.go:193] scheme "" not registered, fallback to default scheme
Nov 06 20:55:06 nodename kubelet[776]: I1106 20:55:06.366603     776 passthrough.go:48] ccResolverWrapper: sending update to cc: {[{/var/lib/kubelet/plugins/ebs.csi.aws.com/csi.sock 0  <nil>}] <nil>}
Nov 06 20:55:06 nodename kubelet[776]: I1106 20:55:06.366614     776 clientconn.go:577] ClientConn switching balancer to "pick_first"
Nov 06 20:55:06 nodename kubelet[776]: E1106 20:55:06.368047     776 goroutinemap.go:150] Operation for "/var/lib/kubelet/plugins/ebs.csi.aws.com/csi.sock" failed. No retries permitted until 2019-11-06 20:57:08.368022193 +0000 UTC m=+871.375258670 (durationBeforeRetry 2m2s). Error: "RegisterPlugin error -- failed to get plugin info using RPC GetInfo at socket /var/lib/kubelet/plugins/ebs.csi.aws.com/csi.sock, err: rpc error: code = Unimplemented desc = unknown service pluginregistration.Registration"

It works though: ebs volumes are successfully created, mounted, and destroyed, when necessary.

And the driver looks registered:

$ kubectl get csidrivers.storage.k8s.io
NAME              CREATED AT
ebs.csi.aws.com   2019-10-07T21:03:19Z

And the file socket looks like exists there

$ ls -la /var/lib/kubelet/plugins/ebs.csi.aws.com/csi.sock
srwxr-xr-x 1 root root 0 Nov  6 20:42 /var/lib/kubelet/plugins/ebs.csi.aws.com/csi.sock

What you expected to happen?

I think there should be no such error message

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

aws-ebs-csi-driver was installed using the following values (manifests generated from heml chart then applied):

image:
  tag: "v0.4.0"

enableVolumeScheduling: true

enableVolumeResizing: true

resources:
  limits:
    cpu: 100m
    memory: 128Mi
  requests:
    cpu: 100m
    memory: 128Mi

Anything else we need to know?:

Environment

• Kubernetes version (use kubectl version):

Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:36:53Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:27:17Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}

• Driver version: 0.4.0