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https://issues.apache.org/jira/browse/LUCENE-8324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer resolved LUCENE-8324.
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Resolution: Fixed
thanks [~dnhatn]
> Unreferenced files of dropped segments should be released
> ---------------------------------------------------------
>
> Key: LUCENE-8324
> URL: https://issues.apache.org/jira/browse/LUCENE-8324
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Affects Versions: 7.4, master (8.0)
> Reporter: Nhat Nguyen
> Priority: Major
> Attachments: LUCENE-8324.patch, release-files.patch
>
>
> {quote} This has the side-effect that flushed segments that are 100% hard
> deleted are also
> cleaned up right after they are flushed, previously these segments were
> sticking
> around for a while until they got picked for a merge or received another
> delete.{quote}
>
> Since LUCENE-8253, a fully deleted segment is dropped immediately when it's
> flushed, however, its files might be kept around even after a commit. In
> other words, we may have unreferenced files which are retained by Deleter.
> I am not entirely sure if we should fix this but it's nice to have a
> consistent content between current files and commit points as before.
> I attached a failed test for this.
> /cc [~simonw]
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