com.mongodb.MongoTimeoutException：在等待连接时在10000毫秒后超时

我以为这个问题被问了好几次，但我不得不再次提出这个问题。因为为这个问题提供的解决方案并没有给我一个确切的答案来摆脱这个血腥的错误。

我使用，当我尝试将文档插入数据库时，我得到以下错误。任何帮助是值得赞赏的。mongo-java-driver-2.12.4mongo.jar

错误：

Exception in thread "main" com.mongodb.MongoTimeoutException: Timed out after 10000 ms while waiting to connect. Client view of cluster state is {type=Unknown, servers=[{address=127.0.0.1:27000, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.ConnectException: Connection refused: connect}}, {address=127.0.0.1:27001, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.ConnectException: Connection refused: connect}}, {address=127.0.0.1:27002, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.ConnectException: Connection refused: connect}}]
    at com.mongodb.BaseCluster.getDescription(BaseCluster.java:128)

法典：

    public class MongoDbConnectDatabase {

    public static void main(String[] args) {

        // To connect to mongodb server
        try {

             List<ServerAddress> lstServer = new ArrayList<ServerAddress>();
             lstServer.add(new ServerAddress("127.0.0.1", 27000));
             lstServer.add(new ServerAddress("127.0.0.1", 27002));
             lstServer.add(new ServerAddress("127.0.0.1", 27001));
             MongoClient  mongoClient = new MongoClient(lstServer);

            // Now connect to your database
            DB db = mongoClient.getDB("test");
            System.out.println("connect to database successfully");

            DBCollection coll = db.createCollection("mycol", null);
            System.out.println("Collection created successfully");

            DBCollection colReceived= db.getCollection("mycol");
            System.out.println("Collection mycol selected successfully");

            BasicDBObject doc = new BasicDBObject("title", "MongoDB").
                    append("description", "database").
                    append("likes", 100).
                    append("url", "http://www.tutorialspoint.com/mongodb/").
                    append("by", "tutorials point");

            colReceived.insert(doc);
                 System.out.println("Document inserted successfully");

        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 

    }

}