Details
-
Bug
-
Status: Closed
-
Blocker
-
Resolution: Fixed
-
0.7.1, 0.8.0, 0.8.1, 0.9.0, 0.10.0, 0.11.0
-
None
-
None
Description
join on more than 2^31 rows leads to wrong results. for example:
Create table small_table (p1 string) ROW FORMAT DELIMITED LINES TERMINATED BY '\n';
Create table big_table (p1 string) ROW FORMAT DELIMITED LINES TERMINATED BY '\n';
Loading 1 row to small_table (the value 1).
Loading 2149580800 rows to big_table with the same value (1 on this case).
create table output as select a.p1 from big_table a join small_table b on (a.p1=b.p1);
select count from output ; will return only 1 row...
the reducer syslog:
...
2013-06-13 17:20:59,254 INFO ExecReducer: ExecReducer: processing 2147000000 rows: used memory = 32925960
2013-06-13 17:21:00,745 INFO ExecReducer: ExecReducer: processing 2148000000 rows: used memory = 12815184
2013-06-13 17:21:02,205 INFO ExecReducer: ExecReducer: processing 2149000000 rows: used memory = 26684552 <-- looks like wrong value..
...
2013-06-13 17:21:04,062 INFO ExecReducer: ExecReducer: processed 2149580801 rows: used memory = 17715896
2013-06-13 17:21:04,062 INFO org.apache.hadoop.hive.ql.exec.JoinOperator: 4 finished. closing...
2013-06-13 17:21:04,062 INFO org.apache.hadoop.hive.ql.exec.JoinOperator: 4 forwarded 1 rows
2013-06-13 17:21:05,791 INFO org.apache.hadoop.hive.ql.exec.JoinOperator: SKEWJOINFOLLOWUPJOBS:0
2013-06-13 17:21:05,792 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: 5 finished. closing...
2013-06-13 17:21:05,792 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: 5 forwarded 1 rows
2013-06-13 17:21:05,792 INFO org.apache.hadoop.hive.ql.exec.FileSinkOperator: 6 finished. closing...
2013-06-13 17:21:05,792 INFO org.apache.hadoop.hive.ql.exec.FileSinkOperator: 6 forwarded 0 rows
2013-06-13 17:21:05,946 INFO org.apache.hadoop.hive.ql.exec.FileSinkOperator: TABLE_ID_1_ROWCOUNT:1
2013-06-13 17:21:05,946 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: 5 Close done
2013-06-13 17:21:05,946 INFO org.apache.hadoop.hive.ql.exec.JoinOperator: 4 Close done
Attachments
Attachments
Issue Links
- is related to
-
HIVE-4838 Refactor MapJoin HashMap code to improve testability and readability
- Closed