From 92a83f938d22c4b022754f2201e431ca225fd631 Mon Sep 17 00:00:00 2001
From: Erik Olson <oerik@google.com>
Date: Mon, 21 Oct 2019 13:13:41 -0400
Subject: [PATCH] Fix GKE Metadata Server Error

---
 .../google/api/client/googleapis/auth/oauth2/OAuth2Utils.java    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/OAuth2Utils.java b/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/OAuth2Utils.java
index ecf9f19ab..8c9c5afac 100644
--- a/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/OAuth2Utils.java
+++ b/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/OAuth2Utils.java
@@ -83,6 +83,7 @@ static boolean runningOnComputeEngine(HttpTransport transport,
       try {
         HttpRequest request = transport.createRequestFactory().buildGetRequest(tokenUrl);
         request.setConnectTimeout(COMPUTE_PING_CONNECTION_TIMEOUT_MS);
+        request.getHeaders().set("Metadata-Flavor", "Google");
         HttpResponse response = request.execute();
         try {
           HttpHeaders headers = response.getHeaders();