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https://issues.apache.org/jira/browse/LUCENE-10088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17411306#comment-17411306
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Adrien Grand commented on LUCENE-10088:
---------------------------------------

I dug a bit and I'm seeing almost 600 blocked flushes 
(DocumentsWriterFlushControl#blockedFlushes) when the exception is raised. I 
still don't understand why this number goes so high, but it looks to me like 
this isn't about leaked files, IndexWriter knows about these 600 segments that 
are pending to be flushed and the reason why we are seeing files for stored 
fields is because stored fields are the only data structure that gets written 
on the fly.

> Too many open files in 
> TestIndexWriterMergePolicy.testStressUpdateSameDocumentWithMergeOnGetReader
> --------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-10088
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10088
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Priority: Major
>
> [This build 
> failure|https://ci-builds.apache.org/job/Lucene/job/Lucene-NightlyTests-main/386/]
>  reproduces for me.  I'll try to dig.



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