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https://issues.apache.org/jira/browse/LUCENE-3546?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer reopened LUCENE-3546:
-------------------------------------
I wasn't completely wrong here. The DWDQ#anyChanges() implementation actually
has this particular issue. Patch follows...
> IW#nrtIsCurrent retruns true if changes are in del queue but not in
> bufferedDeleteStream yet
> --------------------------------------------------------------------------------------------
>
> Key: LUCENE-3546
> URL: https://issues.apache.org/jira/browse/LUCENE-3546
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/index
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Assignee: Simon Willnauer
> Fix For: 4.0
>
>
> spinnoff from SOLR-2861 - since the delete queue is not necessarily applied
> entirely on each request there is a chance that there are changes in the
> delete queue but not yet in buffered deletes. this can prevent NRT readers
> from reopen when they should... this shows the problematic code:
> {code}
> Index: java/org/apache/lucene/index/IndexWriter.java
> ===================================================================
> --- java/org/apache/lucene/index/IndexWriter.java (revision 1195214)
> +++ java/org/apache/lucene/index/IndexWriter.java (working copy)
> @@ -4074,7 +4074,7 @@
> synchronized boolean nrtIsCurrent(SegmentInfos infos) {
> //System.out.println("IW.nrtIsCurrent " + (infos.version ==
> segmentInfos.version && !docWriter.anyChanges() &&
> !bufferedDeletesStream.any()));
> ensureOpen();
> - return infos.version == segmentInfos.version && !docWriter.anyChanges()
> && !bufferedDeletesStream.any();
> + return infos.version == segmentInfos.version && !docWriter.anyChanges()
> && !docWriter.deleteQueue.anyChanges();
> }
> {code}
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