Taras Bobrovytsky created IMPALA-6200:
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             Summary: Flakiness in Planner Tests
                 Key: IMPALA-6200
                 URL: https://issues.apache.org/jira/browse/IMPALA-6200
             Project: IMPALA
          Issue Type: Bug
          Components: Infrastructure
    Affects Versions: Impala 2.11.0
            Reporter: Taras Bobrovytsky
            Priority: Critical


Sometimes we are seeing random small variations in Planner tests, which causes 
builds to be flaky.

Actual:
{code}
F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1
|  Per-Host Resources: mem-estimate=48.00MB mem-reservation=0B
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
WRITE TO HDFS [functional.alltypes, OVERWRITE=false, PARTITION-KEYS=(CAST(3 + 
year AS INT),CAST(month - -1 AS INT))]
|  partitions=4
|  mem-estimate=1.56KB mem-reservation=0B
{code}

Expected:
{code}
F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1
|  Per-Host Resources: mem-estimate=32.00MB mem-reservation=0B
WRITE TO HDFS [functional.alltypes, OVERWRITE=false, PARTITION-KEYS=(CAST(3 + 
year AS INT),CAST(month - -1 AS INT))]
|  partitions=4
|  mem-estimate=1.56KB mem-reservation=0B
{code}

Actual:
{code}
|  F01:PLAN FRAGMENT [RANDOM] hosts=2 instances=2
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|  Per-Host Resources: mem-estimate=16.00MB mem-reservation=0B
|  01:SCAN HDFS [functional_parquet.alltypestiny, RANDOM]
|     partitions=4/4 files=4 size=9.75KB
|     stats-rows=unavailable extrapolated-rows=disabled
|     table stats: rows=unavailable size=unavailable
|     column stats: unavailable
|     mem-estimate=16.00MB mem-reservation=0B
|     tuple-ids=1 row-size=88B cardinality=unavailable
{code}

Expected:
{code}
|  F01:PLAN FRAGMENT [RANDOM] hosts=3 instances=3
|  Per-Host Resources: mem-estimate=16.00MB mem-reservation=0B
|  01:SCAN HDFS [functional_parquet.alltypestiny, RANDOM]
|     partitions=4/4 files=4 size=10.48KB
|     stats-rows=unavailable extrapolated-rows=disabled
|     table stats: rows=unavailable size=unavailable
|     column stats: unavailable
|     mem-estimate=16.00MB mem-reservation=0B
|     tuple-ids=1 row-size=88B cardinality=unavailable
{code}



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