Hi all,
very quick question for you. What happens if you ack a tuple twice? Does storm 
keep track of acked tuples?

I had this very strange situation in which the kafka spout was failing tuples 
with the message:

Skipping failed tuple at offset=6760842181 because it's more than 
maxOffsetBehind=1000000 behind _emittedToOffset=6762385621


After double-checking the code, I saw that we were acking a tuple twice. We 
fixed the bug and now everything seems fine but I am not convinced with the 
solution.

What do you guys think?

Regards,
Fabiano Francesconi

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