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https://issues.apache.org/jira/browse/IMPALA-13684?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Quanlong Huang updated IMPALA-13684:
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Issue Type: Bug (was: Improvement)
Summary: waitForHmsEvent() should only wait for events on candidate
tables (was: Improve waitForHmsEvent() to only wait for events on candidate
tables)
> waitForHmsEvent() should only wait for events on candidate tables
> -----------------------------------------------------------------
>
> Key: IMPALA-13684
> URL: https://issues.apache.org/jira/browse/IMPALA-13684
> Project: IMPALA
> Issue Type: Bug
> Components: Catalog
> Reporter: Quanlong Huang
> Assignee: Quanlong Huang
> Priority: Critical
> Fix For: Impala 5.0.0
>
>
> IMPALA-12152 adds a waiting mechanism before query planning to wait until
> catalogd is in synced with HMS events. It simply fetched the latest event id
> when the TWaitForHmsEventRequest is processed and wait until that event is
> processed.
> For non-transactional tables, we can leverage HIVE-27499 to efficiently
> detect whether the candidate tables have unsynced events and just wait for
> the *largest* id of them.
> On the other hand, if a candidate table is unloaded in catalogd, we don't
> need to wait for its events since there are no stale metadata of it cached in
> catalogd.
> CC [~hemanth619], [~VenuReddy]
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