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https://issues.apache.org/jira/browse/IMPALA-6437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong resolved IMPALA-6437.
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Resolution: Fixed
Fix Version/s: Impala 2.12.0
Impala 3.0
> increase frequency of admission control topic updates
> -----------------------------------------------------
>
> Key: IMPALA-6437
> URL: https://issues.apache.org/jira/browse/IMPALA-6437
> Project: IMPALA
> Issue Type: Improvement
> Components: Distributed Exec
> Reporter: Tim Armstrong
> Assignee: Tim Armstrong
> Priority: Major
> Labels: admission-control, resource-management
> Fix For: Impala 3.0, Impala 2.12.0
>
>
> Currently admission controls don't have a globally consistent view of how
> many queries have admitted so different coordinators can over-admit if
> queries arrive at multiple coordinators in-between topic updates. Topic
> updates happen every 2s by default. Worse, admission control topic updates
> can get stuck behind large catalog updates.
> IMPALA-3649 proposes having a globally consistent view of admission control,
> which will require architectural changes.
> In the meantime we could reduce the problem by increasing the frequency of
> topic updates for admission control and separating them from the larger
> catalog updates.
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