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