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https://issues.apache.org/jira/browse/CASSANDRA-5395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13615816#comment-13615816
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Jonathan Ellis commented on CASSANDRA-5395:
-------------------------------------------

Fixed a test failure and pushed to 
http://github.com/jbellis/cassandra/tree/5395.  (Original patches were also 
half 1.2, half trunk.  Now both against 1.2.)
                
> Compaction doesn't remove index entries as designed
> ---------------------------------------------------
>
>                 Key: CASSANDRA-5395
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5395
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.2.0
>            Reporter: Jonathan Ellis
>            Priority: Minor
>             Fix For: 1.2.4
>
>         Attachments: 5395-2.txt, 5395.txt
>
>
> PerColumnIndexUpdater ignores updates where the new value is a tombstone.  It 
> should still remove the index entry on oldColumn.
> (Note that this will not affect user-visible correctness, since 
> KeysSearcher/CompositeSearcher will issue deletes against stale index 
> entries, but having more stale entries than we "should" could affect 
> performance.)

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