quota_project_id not propagated

What version of gRPC-Java are you using?

24.0.0

What is your environment?

jdk17

What did you expect to see?

A call being made with header x-goog-user-project header when service account has quota_project_id set so that calls are properly counted against chosen quota.

What did you see instead?

No header set.

Steps to reproduce the bug

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;

import com.google.api.gax.core.FixedCredentialsProvider;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.monitoring.v3.MetricServiceClient;
import com.google.cloud.monitoring.v3.MetricServiceSettings;
import com.google.monitoring.v3.ListMetricDescriptorsRequest;

class GcpSample {
    public static void main(String[] args) throws IOException {
        // content of the service account key in json format with quota_project_id field set
        String serviceKey="[SERVICE_ACCOUNT_KEY_IN_JSON_FORMAT]"; 
        String projectId="[YOUR_PROJECT_NAME]";
        InputStream tokenStream = new ByteArrayInputStream(serviceKey.getBytes(StandardCharsets.UTF_8));
        GoogleCredentials creds = GoogleCredentials.fromStream(tokenStream);

        MetricServiceSettings.Builder builder = MetricServiceSettings.newBuilder();
        builder.setCredentialsProvider(FixedCredentialsProvider.create(creds));
        MetricServiceClient stackDriverClient = MetricServiceClient.create(builder.build());


        ListMetricDescriptorsRequest request = ListMetricDescriptorsRequest.newBuilder()
                .setName("projects/" + projectId)
                .setFilter("metric.type=\"compute.googleapis.com/instance/cpu/utilization\"")
                .build();

        stackDriverClient.listMetricDescriptors(request);
    }
}

After some debugging I found out that at some point ServiceAccountCredentials will be converted to ServiceAccountJwtAccessCredentials and it loses the quota_project_id during that conversion. Conversion is done in GoogleAuthLibraryCallCredentials#JwtHelper and the field is just not set.

[ejona86]

This was released in 1.49.0.

[akonarska]

@ejona86 Could you let me know when this is released?