I use field grouping with Apache Storm, it works well.
But if I have an infinite number of field values, this means that the storm must track an infinite number of values in its bolts! Otherwise, some values will go to the wrong bolt and destroy any caching technique.
I believe that there is a cache somewhere in the bolt with the expiration system and / or a limit on the number of field values for checking the grouping of the bolt fields. Can I configure / overwrite it?
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