com.mongodb.MongoTimeoutException when using MongoClient with list ServerAddress

After searching on google. I'm find out that java can't recognize which is the primary database

GWReplication:PRIMARY> cfg=rs.conf();{    "_id" : "GWReplication",    "version" : 1,    "members" : [            {                    "_id" : 0,                    "host" : "G-Server-1:27000"            },            {                    "_id" : 1,                    "host" : "G-Server-1:27001"            },            {                    "_id" : 2,                    "host" : "G-Server-1:27002"            }    ]}

This is default config of my mongodb. And java can't understand G-Server-1 So I fix it by change it to my above ip

GWReplication:PRIMARY> rs.config();{    "_id" : "GWReplication",    "version" : 2,    "members" : [            {                    "_id" : 0,                    "host" : "104.236.106.53:27000"            },            {                    "_id" : 1,                    "host" : "104.236.106.53:27001"            },            {                    "_id" : 2,                    "host" : "104.236.106.53:27002"            }    ]}

Now it work fine. I know that it's a quite idiot way to fix but honestly I don't know how to make java to recognize my domain name or how to config it on ubuntu server(I deploy mongodb on host of digitalocean and this is first time I use ubuntu and self config a server) -_-

Changing your replica set to ip address is actually the wrong way to go about it.

Try this:

1. Revert back to using the domain names in your replica set configuration.

2. Update your mongo client configuration with the replica set domain names.

    List<ServerAddress> lstServer = new ArrayList<ServerAddress>(); lstServer.add(new ServerAddress("G-Server-1", 27000)); lstServer.add(new ServerAddress("G-Server-1", 27002)); lstServer.add(new ServerAddress("G-Server-1", 27001)); mongoClient = new MongoClient(lstServer);

That should fix it. Spring Mongo actually uses the host name and port number to determine the primary replica as configured in the replica set.