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From "Simon Willnauer (JIRA)" <>
Subject [jira] Created: (LUCENE-2802) DirectoryReader ignores NRT SegmentInfos in #isOptimized()
Date Mon, 06 Dec 2010 13:41:10 GMT
DirectoryReader ignores NRT SegmentInfos in #isOptimized()

                 Key: LUCENE-2802
             Project: Lucene - Java
          Issue Type: Bug
          Components: Search
    Affects Versions: 4.0
            Reporter: Simon Willnauer

DirectoryReader  only takes shared (with IW) SegmentInfos into account in DirectoryReader#isOptimized().
This can return true even if the actual realtime reader sees more than one segments. 

public boolean isOptimized() {
   // if segmentsInfos changes in IW this can return false positive
    return segmentInfos.size() == 1 && !hasDeletions();

DirectoryReader should check if this reader has a non-nul segmentInfosStart and use that instead

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