Naveen Gangam created HIVE-16257:
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Summary: Intermittent issue with incorrect resultset with Spark
Key: HIVE-16257
URL: https://issues.apache.org/jira/browse/HIVE-16257
Project: Hive
Issue Type: Bug
Components: Hive
Affects Versions: 1.1.0
Reporter: Naveen Gangam
This issue is highly intermittent that only seems to occurs with spark engine.
The following is the testcase.
{code}
drop table if exists test_hos_sample;
create table test_hos_sample (name string, val1 decimal(18,2), val2
decimal(20,3));
insert into test_hos_sample values
('test1',101.12,102.123),('test1',101.12,102.123),('test2',102.12,103.234),('test1',101.12,102.123),('test3',103.52,102.345),('test3',103.52,102.345),('test3',103.52,102.345),('test3',103.52,102.345),('test3',103.52,102.345),('test4',104.52,104.456),('test4',104.52,104.456),('test5',105.52,105.567),('test3',103.52,102.345),('test5',105.52,105.567);
set hive.execution.engine=spark;
select name, val1,val2 from test_hos_sample group by name, val1, val2;
{code}
Expected Results:
{code}
name val1 val2
test5 105.52 105.567
test3 103.52 102.345
test1 101.12 102.123
test4 104.52 104.456
test2 102.12 103.234
{code}
Incorrect results once in a while:
{code}
name val1 val2
test5 105.52 105.567
test3 103.52 102.345
test1 104.52 102.123
test4 104.52 104.456
test2 102.12 103.234
{code}
1) Not reproducible with HoMR.
2) Not an issue when running from spark-shell.
3) Occurs with parquet and text file format as well. (havent tried with other
formats).
4) Occurs in both scenarios when table data is within encryption zone and
outside.
5) Even in clusters where this is reproducible, this occurs once in like 20
times or more.
6) Occurs with both beeline and Hive CLI.
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