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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