[jira] [Updated] (LUCENE-8338) Ensure number returned for PendingDeletes are well defined

["Simon Willnauer (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-8338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Simon Willnauer updated LUCENE-8338:
------------------------------------
    Attachment: LUCENE-8338.patch

> Ensure number returned for PendingDeletes are well defined
> ----------------------------------------------------------
>
>                 Key: LUCENE-8338
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8338
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Simon Willnauer
>            Priority: Major
>             Fix For: 7.4, master (8.0)
>
>         Attachments: LUCENE-8338.patch, LUCENE-8338.patch
>
>
>  Today a call to PendingDeletes#numPendingDeletes might return 0
>     if the deletes are written to disk. This doesn't mean these values are committed
>     or refreshed in the latest reader. Some places in IW use these numbers to make
>     decisions if there has been deletes added since last time checked (BufferedUpdateStream)
>     which can cause wrong (while not fatal) decision ie. to kick of new merges.
>     
>     Now this API is made protected and not visible outside of PendingDeletes to prevent
>     any kind of confusion. The APIs now allow to get absolute numbers of getDelCount and numDocs
>     which have the same name and semantics as their relatives on IndexReader/Writer
>     and SegmentCommitInfo.



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