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https://issues.apache.org/jira/browse/LUCENE-3940?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-3940:
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Attachment: LUCENE-3940.patch
New patch, fixing a bug in the last one, and adding a few more test cases. I
also made the "print curious string on exception" from BTSTC more
ascii-friendly.
I think it's ready.
> When Japanese (Kuromoji) tokenizer removes a punctuation token it should
> leave a hole
> -------------------------------------------------------------------------------------
>
> Key: LUCENE-3940
> URL: https://issues.apache.org/jira/browse/LUCENE-3940
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 4.0
>
> Attachments: LUCENE-3940.patch, LUCENE-3940.patch
>
>
> I modified BaseTokenStreamTestCase to assert that the start/end
> offsets match for graph (posLen > 1) tokens, and this caught a bug in
> Kuromoji when the decompounding of a compound token has a punctuation
> token that's dropped.
> In this case we should leave hole(s) so that the graph is intact, ie,
> the graph should look the same as if the punctuation tokens were not
> initially removed, but then a StopFilter had removed them.
> This also affects tokens that have no compound over them, ie we fail
> to leave a hole today when we remove the punctuation tokens.
> I'm not sure this is serious enough to warrant fixing in 3.6 at the
> last minute...
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