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Posted to issues@impala.apache.org by "Dan Hecht (JIRA)" <ji...@apache.org> on 2018/05/15 17:38:00 UTC

[jira] [Resolved] (IMPALA-5384) Simplify coordinator locking protocol

     [ https://issues.apache.org/jira/browse/IMPALA-5384?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dan Hecht resolved IMPALA-5384.
-------------------------------
       Resolution: Fixed
    Fix Version/s: Impala 3.1.0
                   Impala 2.13.0

> Simplify coordinator locking protocol
> -------------------------------------
>
>                 Key: IMPALA-5384
>                 URL: https://issues.apache.org/jira/browse/IMPALA-5384
>             Project: IMPALA
>          Issue Type: Improvement
>    Affects Versions: Impala 2.9.0
>            Reporter: Marcel Kornacker
>            Assignee: Dan Hecht
>            Priority: Major
>             Fix For: Impala 2.13.0, Impala 3.1.0
>
>
> The coordinator has a central lock (lock_) which is used very liberally to synchronize state changes that don't need to be synchronized, creating a concurrency bottleneck.
> Also, the coordinator contains a number of data structures related to INSERT finalization that don't need to be part of and synchronized with the rest of the coordinator state.



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