[jira] [Updated] (CASSANDRA-15459) Short read protection doesn't work on group-by queries

["Caleb Rackliffe (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-15459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Caleb Rackliffe updated CASSANDRA-15459:
----------------------------------------
    Fix Version/s: 4.0-beta

> Short read protection doesn't work on group-by queries
> ------------------------------------------------------
>
>                 Key: CASSANDRA-15459
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15459
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Legacy/Coordination
>            Reporter: ZhaoYang
>            Assignee: Andres de la Peña
>            Priority: Normal
>              Labels: correctness
>             Fix For: 4.0-beta
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> [DTest to reproduce|https://github.com/apache/cassandra-dtest/compare/master...jasonstack:srp_group_by_trunk?expand=1]: it affects all versions..
> {code}
> In a two-node cluster with RF = 2
> Execute only on Node1:
> * Insert pk=1 and ck=1 with timestamp 9
> * Delete pk=0 and ck=0 with timestamp 10
> * Insert pk=2 and ck=2 with timestamp 9
> Execute only on Node2:
> * Delete pk=1 and ck=1 with timestamp 10
> * Insert pk=0 and ck=0 with timestamp 9
> * Delete pk=2 and ck=2 with timestamp 10
> Query: "SELECT pk, c FROM %s GROUP BY pk LIMIT 1"
> * Expect no live data, but got [0, 0]
> {code}
> Note: for group-by queries, SRP should use "group counted" to calculate limits used for SRP query, rather than "row counted".



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