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https://issues.apache.org/jira/browse/LUCENE-5741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14019882#comment-14019882
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Michael McCandless commented on LUCENE-5741:
--------------------------------------------
The SegmentInfoPerCommit from the reader should be the very same instance as
the one inside IndexWriter's SegmentInfos, and so the Object.equals impl (using
==) works here.
So we need to figure out why in your case == returns false. Can you describe
where the reader that you are passing in came from? It must be a
near-real-time reader in order to work.
Or can you make a small test case?
> IndexWriter.tryDeleteDocument does not work
> -------------------------------------------
>
> Key: LUCENE-5741
> URL: https://issues.apache.org/jira/browse/LUCENE-5741
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Affects Versions: 4.3, 4.5, 4.6, 4.7, 4.8, 4.8.1
> Reporter: Zhuravskiy Vitaliy
> Assignee: Michael McCandless
> Priority: Critical
>
> I am using "fresh"a and opened reader.
> One segement and 3 documents in index.
> tryDeleteDocument always return false, i deep into your code, and see follow,
> that
> segmentInfos.indexOf(info)
> always return -1 because org.apache.lucene.index.SegmentInfoPerCommit doesnot
> have equals method, see screenshoot for more inforamtion
> http://postimg.org/image/jvtezvqnn/
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