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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2009/10/29 18:23:59 UTC
[jira] Issue Comment Edited: (LUCENE-2016) replace invalid U+FFFF
character during indexing
[ https://issues.apache.org/jira/browse/LUCENE-2016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12771486#action_12771486 ]
Robert Muir edited comment on LUCENE-2016 at 10/29/09 5:22 PM:
---------------------------------------------------------------
even disregarding the problem, I think FFFD is much better than truncation... its what i expect.
but I think we should handle U+FFFE also. (and FDD0-FDEF)
there are actually a few more 'guaranteed not to be a characters, not for interchange' outside of the BMP, but that invalid surrogate logic looks pretty hairy already :)
to see the full list, look at http://www.unicode.org/charts/
under subheading:
Noncharacters in Charts
Reserved range
Noncharacters at end of ...
was (Author: rcmuir):
even disregarding the problem, I think FFFD is much better than truncation... its what i expect.
but I think we should handle U+FFFE also.
there are actually a few more 'guaranteed not to be a characters, not for interchange' outside of the BMP, but that invalid surrogate logic looks pretty hairy already :)
to see the full list, look at http://www.unicode.org/charts/
under subheading:
Noncharacters in Charts
Reserved range
Noncharacters at end of ...
> replace invalid U+FFFF character during indexing
> ------------------------------------------------
>
> Key: LUCENE-2016
> URL: https://issues.apache.org/jira/browse/LUCENE-2016
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 2.4, 2.4.1, 2.9
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 2.9.1, 3.0
>
> Attachments: LUCENE-2016.patch
>
>
> If the invalid U+FFFF character is embedded in a token, it actually causes indexing to silently corrupt the index by writing duplicate terms into the terms dict. CheckIndex will catch the error, and merging will hit exceptions (I think).
> We already replace invalid surrogate pairs with the replacement character U+FFFD, so I'll just do the same with U+FFFF.
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