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Posted to issues@impala.apache.org by "Tim Armstrong (Jira)" <ji...@apache.org> on 2020/01/17 22:20:00 UTC

[jira] [Resolved] (IMPALA-9197) Hash table lookup should be read-only

     [ https://issues.apache.org/jira/browse/IMPALA-9197?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-9197.
-----------------------------------
    Fix Version/s: Impala 3.4.0
       Resolution: Fixed

> Hash table lookup should be read-only
> -------------------------------------
>
>                 Key: IMPALA-9197
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9197
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>            Reporter: Tim Armstrong
>            Assignee: Tim Armstrong
>            Priority: Major
>              Labels: multithreading
>             Fix For: Impala 3.4.0
>
>
> For IMPALA-9156, we need concurrent lookups to the hash table to be thread safe. We are pretty close to that, except a few stats are maintained in HashTable and would be modified concurrently from multiple threads.
> We should modify those  places to update the stats in HashTableCtx instead.



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