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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 resolved IMPALA-13684.
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Target Version: Impala 5.0.0
Resolution: Fixed
> Improve waitForHmsEvent() to only wait for events on candidate tables
> ---------------------------------------------------------------------
>
> Key: IMPALA-13684
> URL: https://issues.apache.org/jira/browse/IMPALA-13684
> Project: IMPALA
> Issue Type: Improvement
> Components: Catalog
> Reporter: Quanlong Huang
> Assignee: Quanlong Huang
> Priority: Critical
>
> 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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