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https://issues.apache.org/jira/browse/LUCENE-8609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16720279#comment-16720279
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Simon Willnauer commented on LUCENE-8609:
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one question here is if we should deprecate the `maxDoc` / `numDocs` methods in
favor of this?
> Allow getting consistent docstats from IndexWriter
> --------------------------------------------------
>
> Key: LUCENE-8609
> URL: https://issues.apache.org/jira/browse/LUCENE-8609
> Project: Lucene - Core
> Issue Type: Improvement
> Affects Versions: master (8.0), 7.7
> Reporter: Simon Willnauer
> Priority: Major
>
> Today we have #numDocs() and #maxDoc() on IndexWriter. This is enough
> to get all stats for the current index but it's subject to concurrency
> and might return numbers that are not consistent ie. some cases can
> return maxDoc < numDocs which is undesirable. This change adds a
> getDocStats()
> method to index writer to allow fetching consistent numbers for these
> stats.
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