[jira] [Created] (HIVE-7731) Incorrect result returned when a map work has multiple downstream reduce works

["Rui Li (JIRA)" <ji...@apache.org>]

Rui Li created HIVE-7731:
----------------------------

             Summary: Incorrect result returned when a map work has multiple downstream reduce works
                 Key: HIVE-7731
                 URL: https://issues.apache.org/jira/browse/HIVE-7731
             Project: Hive
          Issue Type: Bug
          Components: Spark
            Reporter: Rui Li


Encountered when running on spark. Suppose we have three tables:
{noformat}
table1(x int, y int);
table2(x int);
table3(x int);
{noformat}
I run the following query:
{noformat}
from table1
insert overwrite table table2 select x group by x
insert overwrite table table3 select y group by y;
{noformat}
The query generates 1 map and 2 reduces. The map operator has 2 RS, so I suppose it has output for both reduces.
The problem is all (incorrect) results go to table2 and table3 is empty.

I tried the same query on MR and it gives correct results.



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