[ 
https://issues.apache.org/jira/browse/LUCENE-3147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13040670#comment-13040670
 ] 

Robert Muir commented on LUCENE-3147:
-------------------------------------

Here's the stacktrace from the error on windows:
{noformat}
    [junit] ------------- Standard Error -----------------
    [junit] java.io.IOException: could not delete 
c:\Users\rmuir\workspace\leaky3147\lucene\build\test\3\test388355461394710068tmp\write.lock
    [junit]     at org.apache.lucene.util._TestUtil.rmDir(_TestUtil.java:72)
    [junit]     at 
org.apache.lucene.util.LuceneTestCase.afterClassLuceneTestCaseJ4(LuceneTestCase.java:460)
 ...
    [junit] path 
c:\Users\rmuir\workspace\leaky3147\lucene\build\test\3\test388355461394710068tmp
 allocated from
    [junit]     
org.apache.lucene.util.LuceneTestCase.newDirectoryImpl(LuceneTestCase.java:1143)
    [junit]     
org.apache.lucene.util.LuceneTestCase.newDirectory(LuceneTestCase.java:930)
    [junit]     
org.apache.lucene.util.LuceneTestCase.newDirectory(LuceneTestCase.java:922)
    [junit]     
org.apache.lucene.index.TestIndexReader.testFieldCacheReuseAfterReopen(TestIndexReader.java:1661)
{noformat}

> MockDirectoryWrapper should track open file handles of IndexOutput too
> ----------------------------------------------------------------------
>
>                 Key: LUCENE-3147
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3147
>             Project: Lucene - Java
>          Issue Type: Test
>          Components: general/test
>            Reporter: Shai Erera
>            Assignee: Shai Erera
>            Priority: Minor
>             Fix For: 3.2, 4.0
>
>         Attachments: LUCENE-3147.patch, LUCENE-3147.patch, LUCENE-3147.patch, 
> LUCENE-3147.patch, LUCENE-3147.patch, LUCENE-3147.patch, LUCENE-3147.patch, 
> LUCENE-3147.patch, LUCENE-3147.patch
>
>
> MockDirectoryWrapper currently tracks open file handles of IndexInput only. 
> Therefore IO files that are not closed do not fail our tests, which can then 
> lead to test directories fail to delete on Windows. We should make sure all 
> open files are tracked and if they are left open, fail the test. I'll attach 
> a patch shortly.

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