mongoDB async driver java - unable to connect with authentication - mongodb

Question

Recently we've updated our mongoDB with port 35489 and also with authentication and roles to the database.
I've granted readWrite and readWriteAnyDatabase roles for a user and can successfully connect from our c# coding from mentioning it from the web.config
My web.config:
<add key="MongoConnectionString" value="mongodb://readWriteUser:********#192.168.1.225:35489/admin" />
Now, my problem is I'm uanble to connect to mongoDB from java async driver and it is throwing an exception like
Exception
Exception in monitor thread while connecting to server localhost:35489 com.mongodb.MongoSecurityException: Exception authenticating MongoCredential{mechanism=null, userName='AdminAllDatabases', source='admin', password=, mechanismProperties={}} at com.mongodb.connection.SaslAuthenticator.authenticate(SaslAuthenticator.java:61) at com.mongodb.connection.DefaultAuthenticator.authenticate(DefaultAuthenticator.java:32) at com.mongodb.connection.InternalStreamConnectionInitializer.authenticateAll(InternalStreamConnectionInitializer.java:99) at com.mongodb.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:44) at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:115) at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:127) at java.lang.Thread.run(Unknown Source) Caused by: com.mongodb.MongoCommandException: Command failed with error 18: 'Authentication failed.' on server localhost:35489. The full response is { "ok" : 0.0, "code" : 18, "errmsg" : "Authentication failed." } at com.mongodb.connection.CommandHelper.createCommandFailureException(CommandHelper.java:170) at com.mongodb.connection.CommandHelper.receiveCommandResult(CommandHelper.java:123) at com.mongodb.connection.CommandHelper.executeCommand(CommandHelper.java:32) at com.mongodb.connection.SaslAuthenticator.sendSaslContinue(SaslAuthenticator.java:99) at com.mongodb.connection.SaslAuthenticator.authenticate(SaslAuthenticator.java:58) ... 6 common frames omitted
My async java driver code:
public static final String DEFAULT_URI = "mongodb://readWriteUser:******#localhost:35489/";
public static synchronized ConnectionString getConnectionString()
{
if (connectionString == null)
{
connectionString = new ConnectionString(DEFAULT_URI);
}
return connectionString;
}
public static synchronized MongoClient getMongoClient()
{
if (mongoClient == null)
{
mongoClient = MongoClients.create(getConnectionString());
}
return mongoClient;
}
we've tried with both localhost and ip address, but nothing seems to work.
Can anyone suggest me the right way to do this?