[HIVE-1138] Hive using lzo comporession returns unexpected results.

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Not A Problem
• Affects Version/s: 0.6.0
• Component/s: Query Processor

Environment

hadoop 0.20.1, hive trunk 2010-02-03

• Assignee: Bennie Schut
• Reporter: Bennie Schut
• Created: 08/Feb/10 10:58
• Updated: 09/Feb/10 12:27
• Resolved: 09/Feb/10 12:27

Description

I have a tab separated files I have loaded it with "load data inpath" then I do a

SET hive.exec.compress.output=true;
SET mapred.output.compression.codec=com.hadoop.compression.lzo.LzoCodec;
SET mapred.map.output.compression.codec=com.hadoop.compression.lzo.LzoCodec;
select distinct login_cldr_id as cldr_id from chatsessions_load;

Ended Job = job_201001151039_1641
OK
NULL
NULL
NULL
Time taken: 49.06 seconds

however if I start it without the set commands I get this:
Ended Job = job_201001151039_1642
OK
2283
Time taken: 45.308 seconds

Which is the correct result.

When I do a "insert overwrite" on a rcfile table it will actually compress the data correctly.
When I disable compression and query this new table the result is correct.
When I enable compression it's wrong again.
I see no errors in the logs.