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https://issues.apache.org/jira/browse/LUCENE-9115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-9115.
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Fix Version/s: 8.5
Resolution: Fixed
> NRTCachingDirectory may put large files in the cache
> ----------------------------------------------------
>
> Key: LUCENE-9115
> URL: https://issues.apache.org/jira/browse/LUCENE-9115
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Adrien Grand
> Priority: Minor
> Fix For: 8.5
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> NRTCachingDirectory assumes that the length of a file to write is 0 if there
> is no merge info or flush info. This is not correct as there are situations
> when Lucene might write very large files that have neither of them, for
> instance:
> - Stored fields are written on the fly with IOContext.DEFAULT (which doesn't
> have flush or merge info) and without taking any of the IndexWriter buffer,
> so gigabytes could be written before a flush happens.
> - BKD trees are merged with IOContext.DEFAULT.
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