Merge pull request #72201 from nmiculinic/secret_key

pkg/volume/secret/secret.go

@@ -285,7 +285,7 @@ func MakePayload(mappings []v1.KeyToPath, secret *v1.Secret, defaultMode *int32,
 				if optional {
 					continue
 				}
-				errMsg := "references non-existent secret key"
+				errMsg := fmt.Sprintf("references non-existent secret key: %s", ktp.Key)
 				klog.Errorf(errMsg)
 				return nil, fmt.Errorf(errMsg)
 			}