Java clusterMonitor repro

ClusterMonitorRepro.java

import com.mongodb.*;
import com.mongodb.util.JSON;
import com.mongodb.util.JSONSerializers;
import org.bson.BSON;
import org.bson.BSONObject;
import org.bson.types.ObjectId;
import org.json.JSONObject;
import org.junit.Test;

import java.io.*;
import java.net.Authenticator;
import java.net.Socket;
import java.util.*;

public class ClusterMonitorRepro {

    public static void main(String[] args) throws Exception {
        final MongoCredential credential = MongoCredential.createScramSha1Credential("usernameWithClusterMonitorRole", "admin", "password".toCharArray());
        final MongoClient client = new MongoClient(new ServerAddress("localhost", 6000), Collections.singletonList(credential));
        try {
            final DBCollection collection = client.getDB("admin").getCollection("system.profile");
            try (final DBCursor cursor = collection.find()
                    .sort(new BasicDBObject("$natural", -1))
                    .limit(20)
                    .setReadPreference(ReadPreference.primaryPreferred())) {

                while(cursor.hasNext()) {
                    cursor.next();
                }
            }
        } finally {
            client.close();
        }
    }
}