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https://issues.apache.org/jira/browse/LUCENE-2805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12968713#action_12968713
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Simon Willnauer commented on LUCENE-2805:
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bq. Except I think we can now simplify IW.nrtIsCurrent to this?
Yay, this make the nrtIsCurrent check simpler too. Lemme see if anything
breaks, I think that could cause a test to fail since we compared the seg infos
though.
> SegmentInfos shouldn't blindly increment version on commit
> ----------------------------------------------------------
>
> Key: LUCENE-2805
> URL: https://issues.apache.org/jira/browse/LUCENE-2805
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Reporter: Michael McCandless
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2805.patch, LUCENE-2805.patch
>
>
> SegmentInfos currently increments version on the assumption that there are
> always changes.
> But, both DirReader and IW are more careful about tracking whether there are
> changes. DirReader has hasChanges and IW has changeCount. I think these
> classes should notify the SIS when there are in fact changes; this will fix
> the case Simon hit on fixing LUCENE-2082 when the NRT reader thought there
> were changes, but in fact there weren't because IW simply committed the exact
> SIS it already had.
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