[IMPALA-7007] Kudu duplicate key count can be off

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Impala 2.12.0
• Component/s: Backend
• Epic Color: ghx-label-6
• Assignee: Unassigned
• Reporter: Balazs Jeszenszky
• Created: 10/May/18 12:28
• Updated: 29/Jan/21 15:49

Description

After inserting TPC-H data into Kudu by doing:

insert into lineitem select * from PARQUETIMPALA500.LINEITEM

, the query profile contains this error:

Errors: Key already present in Kudu table 'impala::kudu_impala_500.LINEITEM'. (1 of -1831809966 similar)

Clearly, the count is off here. Also, it seems this issue can trigger a DCHECK on debug builds. The accompanying log line in that case is:

F0507 09:46:12.673912 29258 error-util.cc:148] Check failed: log_entry.count > 0 (-1831809966 vs. 0) 

Issue Links

• is related to: IMPALA-10465 Improve Kudu DML error logging in Impala