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https://issues.apache.org/jira/browse/CASSANDRA-15259?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jordan West updated CASSANDRA-15259:
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Test and Documentation Plan: Regression test added as part of patch
Status: Patch Available (was: In Progress)
||Branch||Tests||
|[trunk|https://github.com/apache/cassandra/compare/trunk...jrwest:jwest/15259-trunk]|[cci|https://circleci.com/workflow-run/fd4a72ce-d1fd-4c15-8b2a-a20544b658c8]|
|[3.11|https://github.com/apache/cassandra/compare/trunk...jrwest:jwest/15259-3.11]|[cci|https://circleci.com/workflow-run/69faf98e-7cc8-4f68-9af9-d6317e29923d]|
|[3.0|https://github.com/apache/cassandra/compare/trunk...jrwest:jwest/15259-3.0]|[cci|https://circleci.com/workflow-run/b958fc7e-91f1-4b30-a7df-89ea7941ee60]|
> Selecting Index by Lowest Mean Column Count Selects Random Index
> ----------------------------------------------------------------
>
> Key: CASSANDRA-15259
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15259
> Project: Cassandra
> Issue Type: Bug
> Components: Feature/2i Index
> Reporter: Jordan West
> Assignee: Jordan West
> Priority: Urgent
> Fix For: 3.0.19, 4.0, 3.11.x
>
>
> {{CassandraIndex}} uses
> [{{ColumnFamilyStore#getMeanColumns}}|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/index/internal/CassandraIndex.java#L273],
> average columns per partition, which always returns the same answer for
> index CFs because they contain no regular columns and clustering columns
> aren't included in the count in Cassandra 3.0+.
>
>
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