I set up a sharded cluster with every mongod process started with "--keyFile" option.

mongos: port 27017
config: port 27019
mongod: shard1 primary port 27200
mongod: shard1 secondary port 27201
mongod: shard2 primary port 27202
mongod: shard2 secondary port 27203

then, I found I can't connect to mongod and get the serverStatus via java-driver.

my code is like this:

Mongo mongo = new Mongo("localhost", 27200);
DB testDB = mongo.getDB("test");
CommandResult resp = testDB.command("serverStatus");
System.out.println(resp);

the result is :

{ "serverUsed" : "localhost:27200" , "errmsg" : "need to login" , "ok" : 0.0}

but if I run 'mongo' in my console to connect to localhost:27200, I can get the serverStatus result without authentication.