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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,7 @@
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
Expand Down Expand Up @@ -1791,6 +1792,10 @@ public CallCredentialsProvider getCallCredentialsProvider() {
return callCredentialsProvider;
}

private boolean usesNoCredentials() {
return Objects.equals(getCredentials(), NoCredentials.getInstance());
}

public String getCompressorName() {
return compressorName;
}
Expand Down Expand Up @@ -1838,7 +1843,7 @@ private ApiTracerFactory createApiTracerFactory(

// Add Metrics Tracer factory if built in metrics are enabled and if the client is data client
// and if emulator is not enabled.
if (isEnableBuiltInMetrics() && !isAdminClient && !isEmulatorEnabled) {
if (isEnableBuiltInMetrics() && !isAdminClient && !isEmulatorEnabled && !usesNoCredentials()) {
ApiTracerFactory metricsTracerFactory = createMetricsApiTracerFactory();
if (metricsTracerFactory != null) {
apiTracerFactories.add(metricsTracerFactory);
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -738,7 +738,7 @@ public void testLeaderAwareRoutingEnablement() {

@Test
public void testEndToEndTracingEnablement() {
// Test that end to end tracing is disabled by default.
// Test that end-to-end tracing is disabled by default.
assertFalse(SpannerOptions.newBuilder().setProjectId("p").build().isEndToEndTracingEnabled());
assertTrue(
SpannerOptions.newBuilder()
Expand All @@ -755,7 +755,7 @@ public void testEndToEndTracingEnablement() {
}

@Test
public void testmonitoringHost() {
public void testMonitoringHost() {
String metricsEndpoint = "test-endpoint:443";
assertNull(SpannerOptions.newBuilder().setProjectId("p").build().getMonitoringHost());
assertThat(
Expand Down
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