Is write operations go to secondary when i set readpreference as secondary in mongodb?

Question

I have replication set up (localhost:27017(primary),localhost:27018(secondary),localhost:27019(arb))

I have set the readPrefrence as secondary in connection lever like below mongoInstance.setReadPreference(ReadPreference.secondary());

When i save some data through this connection will request rout to primary?

how do i confirm this?

I have seen DBCollection coll = getCollection();

         coll.getStats();
enter code here

In this "serverUsed":"localhost:27018" has shown.

Answer 1

No. As the term says, readPreference only sets the preferred server to read from in the cluster. You can only write to primary servers in a replica set.

Answer 2

It doesn't read from a primary, read preference secondary means exactly this, it doesn't disturb primary ever.