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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 updated IMPALA-14069:
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Summary: Factor possibility of zero timestamps in aggregated event
sequences (was: Factor possibility of 0ns timestamps in aggregated event
sequences)
> 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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