slim bouguerra created HIVE-20893:

             Summary: BloomK Filter probing method is not thread safe
                 Key: HIVE-20893
             Project: Hive
          Issue Type: Bug
          Components: storage-api
            Reporter: slim bouguerra

As far i can tell this is not an issue for Hive yet (most of the usage of 
probing seems to be done by one thread at a time) but it is an issue of other 
users like Druid as per the following 

The fix is proposed by the author of 
[] is to make couple of 
local fields as ThreadLocals.

Idea looks good to me and doesn't have any perf drawbacks.


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