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https://issues.apache.org/jira/browse/LUCENE-8609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16722088#comment-16722088
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ASF subversion and git services commented on LUCENE-8609:
---------------------------------------------------------

Commit e974311d91fd3f2f3aa015c9e56cf2d689290f41 in lucene-solr's branch 
refs/heads/jira/http2 from [~simonw]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=e974311 ]

LUCENE-8609: Allow getting consistent docstats from IndexWriter

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.

This change also deprecates IndexWriter#numDocs() and IndexWriter#maxDoc()
and replaces all their usages wiht IndexWriter#getDocStats()


> 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
>             Fix For: master (8.0), 7.7
>
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
>  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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