[jira] [Resolved] (IMPALA-7692) Profile averages not computed for Exchange InactiveTotalTime TIME_NS counter

["Tim Armstrong (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-7692?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-7692.
-----------------------------------
    Resolution: Duplicate

> Profile averages not computed for Exchange InactiveTotalTime TIME_NS counter
> ----------------------------------------------------------------------------
>
>                 Key: IMPALA-7692
>                 URL: https://issues.apache.org/jira/browse/IMPALA-7692
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>    Affects Versions: Impala 2.6.1
>            Reporter: Paul Rogers
>            Priority: Minor
>              Labels: observability
>
> Ran a unit test against a query profile created from the following Impala version:
> {noformat}
> Impala Version: impalad version 2.6.0-cdh5.8.4 RELEASE (build 207450616f75adbe082a4c2e1145a2384da83fa6)
> {noformat}
> Then, did the math to compare each {{TCounter}} in the {{Fragment Average Fxx}} subtree with the average of the details in the {{Fragment Fxx}}/{{Instance xxx}} subtree. All matched except a few using the {{TUnit.TIME_NS}} counters. The average was always (sometimes?) zero. For example:
> {noformat}
>    EXCHANGE  [HASH(...)]: Incorrect average for InactiveTotalTime (TIME_NS), expected = 11605329272, actual = 0                           
>   2     EXCHANGE  [BROADCAST]: Incorrect average for InactiveTotalTime (TIME_NS), expected = 11043724227, actual = 0
> {noformat}
> Have not checked this with the latest version.



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