【MacOSX】【kubernetes】kubectl applyをすると「Failed to download OpenAPI (the server could not find the requested resource), falling back to swagger」と出る

W0901 16:58:07.005324 45203 factory_object_mapping.go:423] Failed to
download OpenAPI (the server could not find the requested resource),
falling back to swagger
error: error validating "test-deployment.yaml": error validating data
: the server could not find the requested resource;
if you choose to ignore these errors, turn validation off with
--validate=false
--validate=false
をつけると確かにapply
できるけれど。。。
~/D/gerrit-k8s-new ❯❯❯ kubectl version
Client Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.7",
GitCommit:"b30876a5539f09684ff9fde266fda10b37738c9c", GitTreeState:"clean",
BuildDate:"2018-01-16T21:59:57Z", GoVersion:"go1.8.3", Compiler:"gc",
Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.2",
GitCommit:"f6278300bebbb750328ac16ee6dd3aa7d3549568", GitTreeState:"clean",
BuildDate:"2019-08-05T09:15:22Z", GoVersion:"go1.12.5", Compiler:"gc",
Platform:"linux/amd64"}
curl -LO https://storage.googleapis.com/kubernetes-release/release/
$(curl -s https://storage.googleapis.com/kubernetes-release/release/
stable.txt)/bin/darwin/amd64/kubectl
chmod +x ./kubectl
sudo mv ./kubectl /usr/local/bin/kubectl
~/D/gerrit-k8s-new ❯❯❯ kubectl version
Client Version: version.Info{Major:"1", Minor:"15", GitVersion:
"v1.15.3", GitCommit:"2d3c76f9091b6bec110a5e63777c332469e0cba2",
GitTreeState:"clean", BuildDate:"2019-08-19T11:13:54Z", GoVersion:
"go1.12.9", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"15", GitVersion:
"v1.15.2", GitCommit:"f6278300bebbb750328ac16ee6dd3aa7d3549568",
GitTreeState:"clean", BuildDate:"2019-08-05T09:15:22Z", GoVersion:
"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}
~/Desktop ❯❯❯ kubectl apply -f sample-pod.yaml
pod/sample-pod created