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https://issues.apache.org/jira/browse/LUCENE-5246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13781455#comment-13781455
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Shai Erera commented on LUCENE-5246:
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Committed this to trunk. Keeping open until the backport to 4x.
> SegmentInfoPerCommit continues to list unneeded updatesFiles
> ------------------------------------------------------------
>
> Key: LUCENE-5246
> URL: https://issues.apache.org/jira/browse/LUCENE-5246
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Reporter: Shai Erera
> Assignee: Shai Erera
> Attachments: LUCENE-5246.patch, LUCENE-5246.patch
>
>
> SegmentInfoPerCommit continues to list updates files even if they are
> unneeded anymore. For example, if you update the values of documents of field
> 'f', it creates a gen'd .fnm (FieldInfos) file. If you commit/reopen and
> update the field again (maybe now a different set of documents), it creates
> another gen'd .fnm, but continues to list both gens, even though only the
> latest one is needed.
> To solve this, SIPC would need to know then dvGen of each FieldInfo, so that
> it can correctly list only the updates files that are truly needed. I'll work
> on a testcase and fix.
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