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From "Michael McCandless (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-3870) VarDerefBytesImpl doc values prefix length may fall across two pages
Date Wed, 14 Mar 2012 22:40:39 GMT
VarDerefBytesImpl doc values prefix length may fall across two pages
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                 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
             Fix For: 4.0


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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