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https://issues.apache.org/jira/browse/IMPALA-8572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dinesh Garg reassigned IMPALA-8572:
-----------------------------------
Assignee: radford nguyen
> Move query hook execution to before query unregistration
> --------------------------------------------------------
>
> Key: IMPALA-8572
> URL: https://issues.apache.org/jira/browse/IMPALA-8572
> Project: IMPALA
> Issue Type: Sub-task
> Components: Backend
> Reporter: radford nguyen
> Assignee: radford nguyen
> Priority: Major
>
> The backend currently executes query event hooks during
> {{ImpalaServer::UnregisterQuery}}, which may actually only happen a long time
> after the query has actually executed. We depend on either the client closing
> the query/session, the client's connection dropping, or an idle session
> timing out.
> e.g. the following sequence is possible.
> # User executes query from Hue.
> # User goes home for weekend, leaving Hue tab open in browser
> # If we're lucky, the session timeout expires after some amount of idle time.
> # The query gets unregistered, hooks get executed
> It would generally be desirable to move the lineage logger earlier in the
> query lifecycle, so it occurs as soon as all of the required data is
> available.
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