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https://issues.apache.org/jira/browse/LUCENE-1474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711539#action_12711539
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Michael McCandless commented on LUCENE-1474:
--------------------------------------------

Was the index at least partially generated with 2.4.0?  Or was it entirely 
generated with 2.4.1?

> Incorrect SegmentInfo.delCount when IndexReader.flush() is used
> ---------------------------------------------------------------
>
>                 Key: LUCENE-1474
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1474
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Index
>    Affects Versions: 2.4
>            Reporter: Marcel Reutegger
>            Assignee: Michael McCandless
>             Fix For: 2.4.1, 2.9
>
>         Attachments: IndexReaderTest.java
>
>
> When deleted documents are flushed using IndexReader.flush() the delCount in 
> SegmentInfo is updated based on the current value and 
> SegmentReader.pendingDeleteCount (introduced by LUCENE-1267). It seems that 
> pendingDeleteCount is not reset after the commit, which means after a second 
> flush() or close() of an index reader the delCount in SegmentInfo is 
> incorrect. A subsequent IndexReader.open() call will fail with an error when 
> assertions are enabled. E.g.:
> java.lang.AssertionError: delete count mismatch: info=3 vs BitVector=2
>       at 
> org.apache.lucene.index.SegmentReader.loadDeletedDocs(SegmentReader.java:405)
> [...]

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