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https://issues.apache.org/jira/browse/IMPALA-14069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Surya Hebbar closed IMPALA-14069.
---------------------------------
    Resolution: Fixed

> Factor possibility of zero timestamps in aggregated event sequences
> -------------------------------------------------------------------
>
>                 Key: IMPALA-14069
>                 URL: https://issues.apache.org/jira/browse/IMPALA-14069
>             Project: IMPALA
>          Issue Type: Bug
>            Reporter: Surya Hebbar
>            Assignee: Surya Hebbar
>            Priority: Major
>
> Currently, the missing event timestamps are reported(i.e. 
> unreported_event_instance_idxs) and then substituted by zeros within the JSON 
> profile.
> Even with micro/nanosecond precision some event timestamps are still recorded 
> as zeros (i.e. Prepare Finished - 0ns).
> These timestamps need to be distinguished from missing timestamps substituted 
> with zeros(0).
> But, skipping missing values and loosing alignment between instance 
> timestamps is not favorable for summary, representation or visualization.
> So, the aggregated event sequence timestamps should distinguish between both 
> types of timestamps by value(i.e. other than existing 
> unreported_event_instance_idxs)



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