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Posted to issues@ignite.apache.org by "Alexey Goncharuk (Jira)" <ji...@apache.org> on 2020/10/20 12:56:00 UTC

[jira] [Commented] (IGNITE-13572) Duplicates in select query during partition eviction.

    [ https://issues.apache.org/jira/browse/IGNITE-13572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17217589#comment-17217589 ] 

Alexey Goncharuk commented on IGNITE-13572:
-------------------------------------------

[~ivandasch], looks like the issue affects only caches with 0 backups because we have an invalid optimization in {{IndexingQueryFilterImpl#forCache}}:
{code}
        // No backups and explicit partitions -> nothing to filter.
        if (cache.configuration().getBackups() == 0 && parts == null)
            return null;
{code}
As a result, we skip filtering for such caches and allow query to read from RENTING partitions. Removing this code fixes the test.

> Duplicates in select query during partition eviction.
> -----------------------------------------------------
>
>                 Key: IGNITE-13572
>                 URL: https://issues.apache.org/jira/browse/IGNITE-13572
>             Project: Ignite
>          Issue Type: Bug
>          Components: sql
>    Affects Versions: 2.9, 2.8.1
>            Reporter: Ivan Daschinskiy
>            Priority: Critical
>         Attachments: SqlPartitionEvictionTest.java
>
>
> Scenario:
> # Start 2 nodes with indexed atomic partitioned cache with 0 backups.
> # Load sufficient amout of data (or emulate slow removal from idx)
> # Start another node.
> # Perform SELECT * FROM <TABLE>.
> Query result contains duplicates, result size is significantly bigger than expected cache size.
> Reproducer is attached.
> Reproduced on 2.8.1, ongoing 2.9 and master



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