[jira] [Resolved] (CALCITE-3965) Excessive time waiting on DiffRepository lock

["Laurent Goujon (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-3965?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Laurent Goujon resolved CALCITE-3965.
-------------------------------------
    Fix Version/s: 1.23.0
       Resolution: Fixed

Changed merged as [0220166|https://github.com/apache/calcite/commit/022016611091fdc021686aaf1a44f5217b4b3d30]

> Excessive time waiting on DiffRepository lock
> ---------------------------------------------
>
>                 Key: CALCITE-3965
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3965
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>            Reporter: Laurent Goujon
>            Assignee: Laurent Goujon
>            Priority: Major
>             Fix For: 1.23.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> When running the whole test suite from commandline, tests are parallelized and gradle/junit tries to use as many cores as possible (16 on my machine). But the tests take a very long time, approximatevely 90minutes on my machine, and several of them failed because they took too long to complete.
> Using jstack to look at the threads state while tests are running show that most of them are waiting on {{DiffRepository}} methods ({{DiffRepository#expand}} in most cases) while one of the thread obtained the lock (and is usually flushing data on disk).



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