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https://issues.apache.org/jira/browse/LUCENE-1976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12766654#action_12766654
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Michael McCandless commented on LUCENE-1976:
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I plan to back-port this to 2.9.x, since we're doing a 2.9.1 shortly...
> isCurrent() and getVersion() on an NRT reader are broken
> --------------------------------------------------------
>
> Key: LUCENE-1976
> URL: https://issues.apache.org/jira/browse/LUCENE-1976
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: 2.9
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 3.1
>
> Attachments: LUCENE-1976.patch
>
>
> Right now isCurrent() will always return true for an NRT reader and
> getVersion() will always return the version of the last commit. This is
> because the NRT reader holds the live segmentInfos.
> I think isCurrent() should return "false" when any further changes have
> occurred with the writer, else true. This is actually fairly easy to
> determine, since the writer tracks how many docs & deletions are buffered in
> RAM and these counters only increase with each change.
> getVersion should return the version as of when the reader was created.
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