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https://issues.apache.org/jira/browse/LUCENE-4087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer resolved LUCENE-4087.
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Resolution: Fixed
Assignee: Simon Willnauer
Lucene Fields: New,Patch Available (was: New)
committed to trunk and 4x
> Provide consistent IW behavior for illegal meta data changes
> ------------------------------------------------------------
>
> Key: LUCENE-4087
> URL: https://issues.apache.org/jira/browse/LUCENE-4087
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/index
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Assignee: Simon Willnauer
> Fix For: 4.0, 4.1, 5.0
>
> Attachments: LUCENE-4087.patch, LUCENE-4087.patch
>
>
> Currently IW fails late and inconsistent if field metadata like an already
> defined DocValues type or "un"-omitting norms.
> we can approach this similar to how we handle consistent field number and:
>
> * throw exception if indexOptions conflict (e.g. omitTF=true versus
> false) instead of silently dropping positions on merge
> * same with omitNorms
> * same with norms types and docvalues types
> * still keeping field numbers consistent
> this way we could eliminate all these traps and just give an
> exception instead.
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