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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2010/08/27 21:19:55 UTC
[jira] Commented: (LUCENE-2627) MMapDirectory chunking is buggy
[ https://issues.apache.org/jira/browse/LUCENE-2627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12903549#action_12903549 ]
Robert Muir commented on LUCENE-2627:
-------------------------------------
for this to fail, your file size has to be an exact multiple of the chunk size (default=Integer.MAX_VALUE), so its not a big deal, but I think we should fix it.
> MMapDirectory chunking is buggy
> -------------------------------
>
> Key: LUCENE-2627
> URL: https://issues.apache.org/jira/browse/LUCENE-2627
> Project: Lucene - Java
> Issue Type: Bug
> Components: Store
> Reporter: Robert Muir
> Attachments: LUCENE-2627.patch, LUCENE-2627_test.patch
>
>
> MMapDirectory uses chunking with MultiMMapIndexInput.
>
> Because Java's ByteBuffer uses an int to address the
> values, it's necessary to access a file >
> Integer.MAX_VALUE in size using multiple byte buffers.
> But i noticed from the clover report the entire MultiMMapIndexInput class is completely untested: no surprise since all tests make tiny indexes.
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