Hey, I just find out (with @dmai’s help) what was the issue (I hope). I was getting the same behavior as yours on my machine. Using a Jaeger Darwin Binary. The issue is that Dgraph sends by default a sampling rate of 0.01 (1%) so you should increase it to 1. Which means 100%.
e.g:
dgraph alpha --jaeger.collector=http://localhost:14268 --trace=1
Now you should be able to see all operations traces right away.
Cheers.