test

Author: sakthivelmanii

google-cloud-spanner/src/main/java/com/google/cloud/spanner/SpannerCloudMonitoringExporter.java

@@ -82,7 +82,7 @@ static SpannerCloudMonitoringExporter create(
       throws IOException {
     MetricServiceSettings.Builder settingsBuilder = MetricServiceSettings.newBuilder();
     CredentialsProvider credentialsProvider;
-    if (credentials == null) {
+    if (credentials == null || credentials instanceof NoCredentials) {
       credentialsProvider = NoCredentialsProvider.create();
     } else {
       credentialsProvider = FixedCredentialsProvider.create(credentials);
@@ -189,6 +189,7 @@ private CompletableResultCode exportSpannerClientMetrics(Collection<MetricData>
         new ApiFutureCallback<List<Empty>>() {
           @Override
           public void onFailure(Throwable throwable) {
+            throwable.printStackTrace(System.err);
             if (spannerExportFailureLogged.compareAndSet(false, true)) {
               String msg = "createServiceTimeSeries request failed for spanner metrics.";
               if (throwable instanceof PermissionDeniedException) {