在使用replicaset连接嵌入式mongodb以执行junit测试用例时，我遇到了以下问题。我得到以下例外。

[mongod output] 2021-03-06T23:28:13.202+0530 I CONTROL  [initandlisten]**WARNING: This server is bound to localhost.

[mongod output] 2021-03-06T23:28:13.202+0530 I CONTROL  [initandlisten]**        Remote systems will be unable to connect to this server. 

[mongod output] 2021-03-06T23:28:13.202+0530 I CONTROL  [initandlisten]**        Start the server with --bind_ip <address> to specify which IP 

[mongod output] 2021-03-06T23:28:13.202+0530 I CONTROL  [initandlisten]**        addresses it should serve responses from, or with --bind_ip_all to

[mongod output] 2021-03-06T23:28:13.202+0530 I CONTROL  [initandlisten]**        bind to all interfaces. If this behavior is desired, start the

[mongod output] 2021-03-06T23:28:13.202+0530 I CONTROL  [initandlisten]**        server with --bind_ip 127.0.0.1 to disable this warning.

[mongod output] 2021-03-06T23:28:13.202+0530 I CONTROL  [initandlisten] 

[mongod output] 2021-03-06T23:28:13.206+0530 I STORAGE  [initandlisten] createCollection: local.startup_log with generated UUID: 05d4a8b0-4709-4a0d-91fa-0de499c942a0

[mongod output] 2021-03-06T23:28:13.856+0530 I FTDC     [initandlisten] Initializing full-time diagnostic data capture with directory 'C:/Users/mishrd5/AppData/Local/Temp/embedmongo-db-9c4148c7-97f4-498d-bf55-a03c88a38830/diagnostic.data'

[mongod output] 2021-03-06T23:28:13.857+0530 I STORAGE  [initandlisten] createCollection: local.replset.oplogTruncateAfterPoint with generated UUID: 3fd3b9bc-3f44-4975-ba81-8b995268f49d

[mongod output] 2021-03-06T23:28:13.879+0530 I STORAGE  [initandlisten] createCollection: local.replset.minvalid with generated UUID: a1e095da-9f04-4cda-bd3c-cda0297f4453

[mongod output] 2021-03-06T23:28:13.910+0530 I REPL     [initandlisten] Did not find local voted for document at startup.

[mongod output] 2021-03-06T23:28:13.910+0530 I REPL     [initandlisten] Did not find local Rollback ID document at startup. Creating one.

[mongod output] 2021-03-06T23:28:13.910+0530 I STORAGE  [initandlisten] createCollection: local.system.rollback.id with generated UUID: c82cb441-efd9-4605-abc5-c2a18bbb06c1

[mongod output] 2021-03-06T23:28:13.938+0530 I REPL     [initandlisten] Initialized the rollback ID to 1

[mongod output] 2021-03-06T23:28:13.938+0530 I REPL     [initandlisten] Did not find local replica set configuration document at startup;  NoMatchingDocument: Did not find replica set configuration document in local.system.replset

[mongod output] 2021-03-06T23:28:13.939+0530 I CONTROL  [LogicalSessionCacheRefresh] Sessions collection is not set up; waiting until next sessions refresh interval: Replication has not yet been configured

[mongod output] 2021-03-06T23:28:13.939+0530 I CONTROL  [LogicalSessionCacheReap] Sessions collection is not set up; waiting until next sessions reap interval: Replication has not yet been configured

[mongod output] 2021-03-06T23:28:13.939+0530 I NETWORK  [initandlisten] waiting for connections on port 27023

[mongod output] 2021-03-06 23:28:13.939  INFO 18616 --- [           main] d.f.embed.mongo.MongodExecutable         : start de.flapdoodle.embed.mongo.config.MongodConfigBuilder$ImmutableMongodConfig@6870c3c2
2021-03-06 23:28:14.023  INFO 18616 --- [           main] org.mongodb.driver.cluster               : Cluster created with settings {hosts=[host:27021], mode=MULTIPLE, requiredClusterType=REPLICA_SET, serverSelectionTimeout='30000 ms', requiredReplicaSetName='rs0'}
2021-03-06 23:28:14.024  INFO 18616 --- [           main] org.mongodb.driver.cluster               : Adding discovered server host:27021 to client view of cluster
--------------------------------------
MongoClient : com.mongodb.client.internal.MongoClientImpl@53f0d09c
--------------------------------------
2021-03-06 23:28:14.092  INFO 18616 --- [           main] org.mongodb.driver.cluster               : No server chosen by com.mongodb.client.internal.MongoClientDelegate$1@5eabff6b from cluster description ClusterDescription{type=REPLICA_SET, connectionMode=MULTIPLE, serverDescriptions=[ServerDescription{address=host:27021, type=UNKNOWN, state=CONNECTING}]}. Waiting for 30000 ms before timing out
2021-03-06 23:28:28.297  INFO 18616 --- [ll'}-host:27021] org.mongodb.driver.cluster               : Exception in monitor thread while connecting to server host:27021

com.mongodb.MongoSocketException: host
    at com.mongodb.ServerAddress.getSocketAddresses(ServerAddress.java:211) ~[mongodb-driver-core-4.0.5.jar:na]
    at com.mongodb.internal.connection.SocketStream.initializeSocket(SocketStream.java:75) ~[mongodb-driver-core-4.0.5.jar:na]
    at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:65) ~[mongodb-driver-core-4.0.5.jar:na]
    at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:127) ~[mongodb-driver-core-4.0.5.jar:na]
    at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:117) ~[mongodb-driver-core-4.0.5.jar:na]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_261]
Caused by: java.net.UnknownHostException: host
    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[na:1.8.0_261]
    at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:929) ~[na:1.8.0_261]
    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1324) ~[na:1.8.0_261]
    at java.net.InetAddress.getAllByName0(InetAddress.java:1277) ~[na:1.8.0_261]
    at java.net.InetAddress.getAllByName(InetAddress.java:1193) ~[na:1.8.0_261]
    at java.net.InetAddress.getAllByName(InetAddress.java:1127) ~[na:1.8.0_261]
    at com.mongodb.ServerAddress.getSocketAddresses(ServerAddress.java:203) ~[mongodb-driver-core-4.0.5.jar:na]
    ... 5 common frames omitted

我提供以下代码。

@Profile("test")
@ActiveProfiles("test")
@TestConfiguration
public class TestMongoDBConfig implements InitializingBean, DisposableBean {

    /**The executable. */
    private MongodExecutable executable;

    private MongoTemplate mongoTemplate;

    private MongodProcess node1Mongod;
    private MongodProcess node2Mongod;
    private MongodExecutable node1MongodExe;
    private MongodExecutable node2MongodExe;
    private int node1Port = 27021;
  private int node2Port = 27023;    
    private static final String CONNECTION_STRING = "mongodb://%s:%d";
    private int port = 27021;

    @Override
    public void afterPropertiesSet() throws Exception {

//      IFeatureAwareVersion version = de.flapdoodle.embed.mongo.distribution.Versions
//              .withFeatures(new GenericVersion("4.0.0"), Version.Main.PRODUCTION.getFeatures());
//      IMongoCmdOptions cmdOptions = new MongoCmdOptionsBuilder().useNoPrealloc(false).useSmallFiles(false)
//              .master(false).verbose(false).useNoJournal(false).syncDelay(0).build();
//      port = Network.getFreeServerPort();
//      System.out.println("-------------------------");
//      System.out.println("Test Mongo PORT : "+port);
//      System.out.println("-------------------------");
//      IMongodConfig mongodConfig = new MongodConfigBuilder().version(version)
//              .net(new Net(port, Network.localhostIsIPv6()))
////                .replication(new Storage(null, "testRepSet", 5000))
//              .replication(new Storage(null, "rs0", 5000))
//            .configServer(true)
////            .withLaunchArgument("--replSet", "rs0")
////                .configServer(false)
//              .cmdOptions(cmdOptions).build();
//      MongodStarter starter = MongodStarter.getDefaultInstance();
//      executable = starter.prepare(mongodConfig);
//      executable.start();

        //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        MongodStarter runtime = MongodStarter.getDefaultInstance();

        node1MongodExe = runtime.prepare(new MongodConfigBuilder().version(Version.Main.V4_0)
                  .withLaunchArgument("--replSet", "rs0")
                  .cmdOptions(new MongoCmdOptionsBuilder().useNoJournal(false).build())
                  .net(new Net(node1Port, Network.localhostIsIPv6())).build());
          node1Mongod = node1MongodExe.start();

          node2MongodExe = runtime.prepare(new MongodConfigBuilder().version(Version.Main.V4_0)
                  .withLaunchArgument("--replSet", "rs0")
                  .cmdOptions(new MongoCmdOptionsBuilder().useNoJournal(false).build())
                  .net(new Net(node2Port, Network.localhostIsIPv6())).build());
          node2Mongod = node2MongodExe.start();

    }

    /**
     * Mongo client.
     *
     * @return the mongo client
     */
//  @Primary
    @Bean(name = "test1")
    public MongoClient mongoClient() {
        MongoClient mongoClient = MongoClients.create(cs);
        System.out.println("--------------------------------------");
        System.out.println("MongoClient : "+mongoClient);
        System.out.println("--------------------------------------");

        MongoDatabase adminDatabase = mongoClient.getDatabase("admin");

          Document config = new Document("_id", "rs0");
          BasicDBList members = new BasicDBList();
          members.add(new Document("_id", 0)
                  .append("host", "localhost:" + node1Port));
          members.add(new Document("_id", 1)
                  .append("host", "localhost:" + node2Port));
          config.put("members", members);

          adminDatabase.runCommand(new Document("replSetInitiate", config));

        return mongoClient;
    }

    @Override
    public void destroy() throws Exception {
        executable.stop();
    }
}

请忽略注解的代码。我也参考了以下链接，但没有成功。
https://github.com/flapdoodle-oss/de.flapdoodle.embed.mongo/issues/257
在springboot中用flapdoodle嵌入mongodb测试@transactional
使用mongodb版本4和副本配置Flapdoole embedded mongo
请帮帮我。