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https://issues.apache.org/jira/browse/LUCENE-1761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-1761:
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Labels: gsoc2012 lucene-gsoc-12 (was: )
> low level Field metadata is never removed from index
> ----------------------------------------------------
>
> Key: LUCENE-1761
> URL: https://issues.apache.org/jira/browse/LUCENE-1761
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/index
> Affects Versions: 2.2, 2.3, 2.3.1, 2.3.2, 2.4, 2.4.1
> Reporter: Hoss Man
> Priority: Minor
> Labels: gsoc2012, lucene-gsoc-12
> Attachments: LUCENE-1761.patch
>
>
> with heterogeneous docs, or an index whose fields evolve over time, field
> names that are no longer used (ie: all docs that ever referenced them have
> been deleted) still show up when you use IndexReader.getFieldNames.
> It seems logical that segment merging should only preserve metadata about
> fields that actually existing the new segment, but even after deleting all
> documents from an index and optimizing the old field names are still present.
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