[IMPALA-7025] PlannerTest.testTableSample has wrong mem-reservation

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Impala 3.1.0
• Fix Version/s: Impala 2.13.0, Impala 3.1.0
• Component/s: Frontend
• Labels: broken-build flaky
• Target Version: Impala 3.1.0
• Epic Color: ghx-label-6
• Assignee: Tim Armstrong
• Reporter: Joe McDonnell
• Created: 14/May/18 18:58
• Updated: 18/May/18 05:11
• Resolved: 16/May/18 23:50

Description

Seen once on master exhaustive:

Error Message
Section PLAN of query:
select id from functional_parquet.alltypes tablesample system(10) repeatable(1234)

Actual does not match expected result:
F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1
|  Per-Host Resources: mem-estimate=16.00MB mem-reservation=8.00KB thread-reservation=2
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
PLAN-ROOT SINK
|  mem-estimate=0B mem-reservation=0B thread-reservation=0
|
00:SCAN HDFS [functional_parquet.alltypes]
   partitions=3/24 files=3 size=23.70KB
   stored statistics:
     table: rows=unavailable size=unavailable
     partitions: 0/24 rows=unavailable
     columns: unavailable
   extrapolated-rows=disabled max-scan-range-rows=unavailable
   mem-estimate=16.00MB mem-reservation=8.00KB thread-reservation=1
   tuple-ids=0 row-size=4B cardinality=unavailable

Expected:
F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1
|  Per-Host Resources: mem-estimate=16.00MB mem-reservation=16.00KB thread-reservation=2
PLAN-ROOT SINK
|  mem-estimate=0B mem-reservation=0B thread-reservation=0
|
00:SCAN HDFS [functional_parquet.alltypes]
   partitions=3/24 files=3 size=24.23KB
   stored statistics:
     table: rows=unavailable size=unavailable
     partitions: 0/24 rows=unavailable
     columns: unavailable
   extrapolated-rows=disabled max-scan-range-rows=unavailable
   mem-estimate=16.00MB mem-reservation=16.00KB thread-reservation=1
   tuple-ids=0 row-size=4B cardinality=unavailable

This succeeded on the next build, so it is flaky and might not recur.