Jonathan Ellis created CASSANDRA-5395:
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             Summary: 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


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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