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https://issues.apache.org/jira/browse/LUCENE-3520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless resolved LUCENE-3520.
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Resolution: Fixed
> If the NRT reader hasn't changed then IndexReader.openIfChanged should return
> null
> ----------------------------------------------------------------------------------
>
> Key: LUCENE-3520
> URL: https://issues.apache.org/jira/browse/LUCENE-3520
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/index
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 3.5, 4.0
>
> Attachments: LUCENE-3520.patch, LUCENE-3520.patch
>
>
> I hit a failure in TestSearcherManager (NOTE: doesn't always fail):
> {noformat}
> ant test -Dtestcase=TestSearcherManager -Dtestmethod=testSearcherManager
> -Dtests.seed=459ac99a4256789c:-29b8a7f52497c3b4:145ae632ae9e1ecf
> {noformat}
> It was tripping the assert inside SearcherLifetimeManager.record,
> because two different IndexSearcher instances had different IR
> instances sharing the same version. This was happening because
> IW.getReader always returns a new reader even when there are no
> changes. I think we should fix that...
> Separately I found a deadlock in
> TestSearcherManager.testIntermediateClose, if the test gets
> SerialMergeScheduler and needs to merge during the second commit.
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