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http://issues.apache.org/jira/browse/LUCENE-727?page=comments#action_12454081 ]
Michael McCandless commented on LUCENE-727:
-------------------------------------------
Thank you Benson for the unit test and opening this issue!
Indeed, when I run your test, I see the exception in Lucene-2.0.0, but, not on
the trunk.
It looks like lockless commits (LUCENE-701 ) has fixed this because the files
in the index are now "write once". Specifically, we no longer try to rename
any files (nor do we even use the "deletable" file anymore). The general
philosopy is to rely on as little from the filesystem as we possibly can, so as
to maximize portability...
This is the exception on Lucene 2.0.0:
[junit] Testcase: testMmapIndex(org.apache.lucene.index.TestWindowsMMap):
Caused an ERROR
[junit] Cannot delete F:\mike\src\lucene-2.0.0\testLuceneMmap\deletable
[junit] java.io.IOException: Cannot delete
F:\mike\src\lucene-2.0.0\testLuceneMmap\deletable
[junit] at
org.apache.lucene.store.FSDirectory.renameFile(FSDirectory.java:268)
[junit] at
org.apache.lucene.index.IndexWriter.writeDeleteableFiles(IndexWriter.java:827)
[junit] at
org.apache.lucene.index.IndexWriter.deleteFiles(IndexWriter.java:778)
[junit] at
org.apache.lucene.index.IndexWriter.mergeSegments(IndexWriter.java:747)
[junit] at
org.apache.lucene.index.IndexWriter.mergeSegments(IndexWriter.java:686)
[junit] at
org.apache.lucene.index.IndexWriter.maybeMergeSegments(IndexWriter.java:674)
[junit] at
org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:479)
[junit] at
org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:462)
[junit] at
org.apache.lucene.index.TestWindowsMMap.testMmapIndex(TestWindowsMMap.java:61)
Since this is fixed on trunk, I'll resolve it as fixed.
But first I'll commit the new unit test (thanks Benson)!
> MMapDirectory can't create new index on Windows
> -----------------------------------------------
>
> Key: LUCENE-727
> URL: http://issues.apache.org/jira/browse/LUCENE-727
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: 2.0.0
> Environment: Windows XP, JDK 1.4
> Reporter: benson margulies
> Assigned To: Michael McCandless
> Attachments: lucenewindowsmmaptest.tgz
>
>
> When I set the system property to request the use of the mmap directory, and
> start building a large index, the process dies with an IOException trying to
> delete a file. Apparently, Lucene isn't closing down the memory map before
> deleting the file.
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