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https://issues.apache.org/jira/browse/IMPALA-7025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16475099#comment-16475099
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Tim Armstrong commented on IMPALA-7025:
---------------------------------------
It could be because a different set of files was selected or because the files
were slightly different sizes. Need to investigate to determine which, although
maybe the ultimate fix is to allow ignoring the resource estimates in these
tests
> PlannerTest.testTableSample has wrong mem-reservation
> -----------------------------------------------------
>
> Key: IMPALA-7025
> URL: https://issues.apache.org/jira/browse/IMPALA-7025
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Affects Versions: Impala 3.1.0
> Reporter: Joe McDonnell
> Assignee: Tim Armstrong
> Priority: Critical
> Labels: broken-build, flaky
>
> Seen once on master exhaustive:
> {noformat}
> 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{noformat}
> This succeeded on the next build, so it is flaky and might not recur.
>
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