[jira] [Commented] (LUCENE-9040) Questionable/Underspecified behavior of DirectoryReader.getIndexCommit() on NRT Readers

["Adrien Grand (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-9040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16977630#comment-16977630 ] 

Adrien Grand commented on LUCENE-9040:
--------------------------------------

I agree there is something to be fixed. I'm not very familiar with index commits, but some things look inconsistent e.g. IndexCommit has a comment that the name is bad as this can also represent a point-in-time view but then the equals/hashcode methods only consider data that identify a commit and that wouldn't change through a reopen, which is why assertions are not failing in your test I guess.

> Questionable/Underspecified behavior of DirectoryReader.getIndexCommit() on NRT Readers
> ---------------------------------------------------------------------------------------
>
>                 Key: LUCENE-9040
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9040
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/index
>            Reporter: Chris M. Hostetter
>            Priority: Major
>         Attachments: LUCENE-9040.patch
>
>
> It seems like DirectoryReader.getIndexCommit() returns weird 
> results when using a "reopened" reader off of uncommited IW changes.
> Even though 2 diff readers will expose diff views of the index, they will 
> claim to refer to the same IndexCommit (generation).
> Original email thread (no replies): http://mail-archives.apache.org/mod_mbox/lucene-dev/201910.mbox/%3Calpine.DEB.2.21.1910301611190.8171%40slate%3E



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