Log errors from handlers.

Author: DangerOnTheRanger

pkg/handler/handler.go

@@ -33,6 +33,7 @@ import (
 	jsoniter "github.com/json-iterator/go"
 	"github.com/munnerz/goautoneg"
 	"gopkg.in/yaml.v2"
+	klog "k8s.io/klog/v2"
 	"k8s.io/kube-openapi/pkg/builder"
 	"k8s.io/kube-openapi/pkg/common"
 	"k8s.io/kube-openapi/pkg/validation/spec"
@@ -239,6 +240,7 @@ func (o *OpenAPIService) RegisterOpenAPIVersionedService(servePath string, handl
 					// serve the first matching media type in the sorted clause list
 					data, etag, lastModified, err := accepts.GetDataAndETag()
 					if err != nil {
+						klog.Errorf("Error in OpenAPI handler: %s", err)
 						w.WriteHeader(http.StatusInternalServerError)
 						return
 					}