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From "Earwin Burrfoot (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2016) replace invalid U+FFFF character during indexing
Date Thu, 29 Oct 2009 18:57:59 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12771559#action_12771559
] 

Earwin Burrfoot commented on LUCENE-2016:
-----------------------------------------

Being one of those hit by U+FFFF earlier, I'd rather like to see remapping happen in some
filter and IW throwing an exception on what it deems 'illegal'. Or at very least a big fat
documentation entry, that jumps in your face somehow and lists all codepoints that will be
remapped.


> 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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