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From "Simon Willnauer (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-3028) IW.getReader() returns inconsistent reader on RT Branch
Date Thu, 14 Apr 2011 10:31:05 GMT
IW.getReader() returns inconsistent reader on RT Branch
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                 Key: LUCENE-3028
                 URL: https://issues.apache.org/jira/browse/LUCENE-3028
             Project: Lucene - Java
          Issue Type: Bug
          Components: Index
    Affects Versions: Realtime Branch
            Reporter: Simon Willnauer
            Assignee: Simon Willnauer
             Fix For: Realtime Branch


I extended the testcase TestRollingUpdates#testUpdateSameDoc to pull a NRT reader after each
update and asserted that is always sees only one document. Yet, this fails with current branch
since there is a problem in how we flush in the getReader() case. What happens here is that
we flush all threads and then release the lock (letting other flushes which came in after
we entered the flushAllThread context, continue) so that we could concurrently get a new segment
that transports global deletes without the corresponding add. They sneak in while we continue
to open the NRT reader which in turn sees inconsistent results.

I will upload a patch soon

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