JDKRequestAdapter hangs/times out on POST operations

[EricWittmann]

Reproducer:

1. Run Apicurio Registry:

docker pull apicurio/apicurio-registry:3.0.5
docker run apicurio/apicurio-registry:3.0.5

2. Run the reproducer class

package io.apicurio.registry.rbac;

import com.microsoft.kiota.RequestAdapter;
import io.apicurio.registry.rest.client.RegistryClient;
import io.apicurio.registry.rest.client.models.CreateGroup;
import io.apicurio.registry.rest.client.models.ProblemDetails;
import io.apicurio.registry.rest.client.models.SystemInfo;
import io.kiota.http.jdk.JDKRequestAdapter;

public class TestJDKRequestAdapter {
    public static void main(String[] args) {
        try {
            RequestAdapter adapter = new JDKRequestAdapter();
            adapter.setBaseUrl("http://localhost:8080/apis/registry/v3");
            var client = new RegistryClient(adapter);
            SystemInfo systemInfo = client.system().info().get();
            System.out.println(systemInfo.getName());
            System.out.println(systemInfo.getDescription());

            CreateGroup createGroup = new CreateGroup();
            createGroup.setGroupId("test-group");
            client.groups().post(createGroup);
        } catch (ProblemDetails e) {
            System.err.println(e.getName());
            System.err.println(e.getTitle());
            System.err.println(e.getDetail());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

If you run that the system.info call will work, but the group creation will hang. It might eventually fail with a "stream closed" error.