I need help on RTO logging in couchbase sdk 3.x

I need help on RTO logging in couchbase sdk 3.x version. I have implemented the code as mentioned in couchbase forum page but I am not getting expected json response. Like my thresholdLogTracing class is not print any response.Can any body please provide help or any reference

My loggingmetrics logs are printing fine on console but thresholdloggingtracer logs are not.

Can anyone explain terms like querythreshold and searvh threshold plz