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https://issues.apache.org/jira/browse/LUCENE-2767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless resolved LUCENE-2767.
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Resolution: Fixed
> Missing sync in IndexWriter.addIndexes(IndexReader[])
> -----------------------------------------------------
>
> Key: LUCENE-2767
> URL: https://issues.apache.org/jira/browse/LUCENE-2767
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 2.9.4, 3.0.3, 3.1, 4.0
>
>
> The 3.x build just hit this:
> {noformat}
> [junit] Testsuite: org.apache.lucene.index.TestAddIndexes
> [junit] Testcase:
> testAddIndexesWithThreads(org.apache.lucene.index.TestAddIndexes): FAILED
> [junit] expected:<3160> but was:<2701>
> [junit] junit.framework.AssertionFailedError: expected:<3160> but
> was:<2701>
> [junit] at
> org.apache.lucene.util.LuceneTestCase$LuceneTestCaseRunner.runChild(LuceneTestCase.java:779)
> [junit] at
> org.apache.lucene.util.LuceneTestCase$LuceneTestCaseRunner.runChild(LuceneTestCase.java:745)
> [junit] at
> org.apache.lucene.index.TestAddIndexes.testAddIndexesWithThreads(TestAddIndexes.java:708)
> [junit]
> [junit]
> [junit] Tests run: 15, Failures: 1, Errors: 0, Time elapsed: 9.28 sec
> [junit]
> [junit] ------------- Standard Output ---------------
> [junit] java.lang.AssertionError: RefCount is 0 pre-decrement for file
> "_8a.tvf"
> [junit] at
> org.apache.lucene.index.IndexFileDeleter$RefCount.DecRef(IndexFileDeleter.java:608)
> [junit] at
> org.apache.lucene.index.IndexFileDeleter.decRef(IndexFileDeleter.java:505)
> [junit] at
> org.apache.lucene.index.IndexFileDeleter.decRef(IndexFileDeleter.java:496)
> [junit] at
> org.apache.lucene.index.IndexWriter.addIndexes(IndexWriter.java:2972)
> [junit] at
> org.apache.lucene.index.TestAddIndexes$CommitAndAddIndexes.doBody(TestAddIndexes.java:681)
> [junit] at
> org.apache.lucene.index.TestAddIndexes$RunAddIndexesThreads$1.run(TestAddIndexes.java:624)
> [junit] NOTE: reproduce with: ant test -Dtestcase=TestAddIndexes
> -Dtestmethod=testAddIndexesWithThreads
> -Dtests.seed=-6912763261803132408:-5575674032550262483 -Dtests.multiplier=3
> [junit] NOTE: test params are: locale=en_AU, timezone=America/Atka
> {noformat}
> It looks like it's caused by a long-standing missing sync (since at least
> 2.9.x). I think likely we hit it just now thanks to adding random
> Thread.yield()'s in MockDirWrapper!
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