I am confused by the Storm-UI statistics.
For example:
Topology Stats show a number of 69 million
kafka-spout shows a number of 34 million
__acker is at 17 million
es-bolt shows 17 million too
My toplogy is kafka-spout --> es-bolt and I am not sure how the numbers above add up?
If Kafka-spout is emitting only 34 million, why do topology stats show 69 million?
And again if Kafka-spout emitted 34 million, why does es-bolt say 17 million?
I see a pattern of tuples being halved from top-to-down, but not sure I understand why? Is it because of ack-tuples or heart-beat bolts?
Are they always half of the upstream spout?