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https://issues.apache.org/jira/browse/LUCENE-10139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17423148#comment-17423148
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Dawid Weiss commented on LUCENE-10139:
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The PR is here, don't know why it doesn't show up.
https://github.com/apache/lucene/pull/340
> ExternalRefSorter should return a covariant with a subtype of
> BytesRefIterator that is Closeable
> -------------------------------------------------------------------------------------------------
>
> Key: LUCENE-10139
> URL: https://issues.apache.org/jira/browse/LUCENE-10139
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Dawid Weiss
> Assignee: Dawid Weiss
> Priority: Trivial
>
> This is a trivial cleanup to make ExternalRefSorter return a covariant
> subtype of BytesRefIterator that is Closeable. This way callers of
> iterator() have a way of making sure I/O resources are closed without fully
> exhausting the iterator (in case of exceptions happening somewhere while
> scanning the byte refs, for example).
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