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https://issues.apache.org/jira/browse/LUCENE-5434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13893568#comment-13893568
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Mark Miller commented on LUCENE-5434:
-------------------------------------
I think a problem with a the wider testing is that even if you are just getting
nrt readers, depending on timing, you can still have legit deletes of open
files that don't make it into a commit point and are not referenced by an nrt
reader.
> NRT support for file systems that do no have delete on last close or cannot
> delete while referenced semantics.
> --------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-5434
> URL: https://issues.apache.org/jira/browse/LUCENE-5434
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Mark Miller
> Assignee: Mark Miller
> Fix For: 5.0, 4.7
>
> Attachments: LUCENE-5434.patch, LUCENE-5434.patch, LUCENE-5434.patch,
> LUCENE-5434.patch
>
>
> See SOLR-5693 and our HDFS support - for something like HDFS to work with
> NRT, we need an ability for near realtime readers to hold references to their
> files to prevent deletes.
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