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Posted to dev@lucene.apache.org by "Simon Willnauer (Assigned) (JIRA)" <ji...@apache.org> on 2012/03/16 10:17:40 UTC
[jira] [Assigned] (LUCENE-3870) VarDerefBytesImpl doc values prefix
length may fall across two pages
[ https://issues.apache.org/jira/browse/LUCENE-3870?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Simon Willnauer reassigned LUCENE-3870:
---------------------------------------
Assignee: Simon Willnauer
> VarDerefBytesImpl doc values prefix length may fall across two pages
> --------------------------------------------------------------------
>
> Key: LUCENE-3870
> URL: https://issues.apache.org/jira/browse/LUCENE-3870
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 4.0
> Reporter: Michael McCandless
> Assignee: Simon Willnauer
> Fix For: 4.0
>
> Attachments: LUCENE-3870.patch
>
>
> The VarDerefBytesImpl doc values encodes the unique byte[] with prefix (1 or 2 bytes) first, followed by bytes, so that it can use PagedBytes.fillSliceWithPrefix.
> It does this itself rather than using PagedBytes.copyUsingLengthPrefix...
> The problem is, it can write an invalid 2 byte prefix spanning two blocks (ie, last byte of block N and first byte of block N+1), which fillSliceWithPrefix won't decode correctly.
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