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https://issues.apache.org/jira/browse/LUCENE-1623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12705133#action_12705133
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Michael McCandless commented on LUCENE-1623:
--------------------------------------------
Great catches Uwe, I'll fold them in -- thanks!
> Back-compat break with non-ascii field names
> --------------------------------------------
>
> Key: LUCENE-1623
> URL: https://issues.apache.org/jira/browse/LUCENE-1623
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: 2.4, 2.4.1
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 2.9
>
> Attachments: LUCENE-1623.patch
>
>
> If a field name contains non-ascii characters in a 2.3.x index, then
> on upgrade to 2.4.x unexpected problems are hit. It's possible to hit
> a "read past EOF" IOException; it's also possible to not hit an
> exception but get an incorrect field name.
> This was caused by LUCENE-510, because the FieldInfos (*.fnm) file is
> not properly versioned.
> Spinoff from http://www.nabble.com/Read-past-EOF-td23276171.html
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