Siddharth Seth created HIVE-12562:
-------------------------------------

             Summary: Enabling native fast hash table can cause incorrect 
results
                 Key: HIVE-12562
                 URL: https://issues.apache.org/jira/browse/HIVE-12562
             Project: Hive
          Issue Type: Bug
            Reporter: Siddharth Seth


Enabling "hive.vectorized.execution.mapjoin.native.fast.hashtable.enabled" 
causes incorrect results when running with LLAP.

I believe this does not happen for simple container runs. However, it's 
possible that caching of these tables, or using the same table more than once 
causes issues - which may be seen with container reuse.

The results vary by a small percentage.
e.g. 82270, 82267 <- Two results for the same query run back to back.

cc [~mmccline]



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