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Posted to issues@impala.apache.org by "Tim Armstrong (Jira)" <ji...@apache.org> on 2020/01/09 03:14:00 UTC
[jira] [Resolved] (IMPALA-9274) Implement phased barrier
synchronisation construct
[ https://issues.apache.org/jira/browse/IMPALA-9274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tim Armstrong resolved IMPALA-9274.
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Fix Version/s: Impala 3.4.0
Resolution: Fixed
> Implement phased barrier synchronisation construct
> --------------------------------------------------
>
> Key: IMPALA-9274
> URL: https://issues.apache.org/jira/browse/IMPALA-9274
> Project: IMPALA
> Issue Type: Sub-task
> Reporter: Tim Armstrong
> Assignee: Tim Armstrong
> Priority: Major
> Fix For: Impala 3.4.0
>
>
> We need a synchronisation primitive that allows n threads to synchronise by joining on a barrier, then having the last arriving thread execute some code and then wake up all of the other threads.
> This is required for implementing phases of the hash join algorithm.
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