It will help with processing if the messages output by 3.2 when client metadata is received in the isMaster command (added in
SERVER-35854) exactly match those output by 3.4+ versions.
There is still no full support for client metadata in MongoDB 3.2, merely these log messages when the info is received, as a way of ensuring that 3.4+ compatible drivers are in use prior to upgrading the server from 3.2 to 3.4.
- related to
SERVER-35854 Log in 3.2 when client metadata is received