Markus Jelsma created LUCENE-9112:
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Summary: OpenNLP tokenizer is fooled by text containing spurious
punctuation
Key: LUCENE-9112
URL: https://issues.apache.org/jira/browse/LUCENE-9112
Project: Lucene - Core
Issue Type: Bug
Components: modules/analysis
Affects Versions: master (9.0)
Reporter: Markus Jelsma
Fix For: master (9.0)
The OpenNLP tokenizer show weird behaviour when text contains spurious
punctuation such as having triple dots trailing a sentence...
# the first dot becomes part of the token, having 'sentence.' becomes the token
# much further down the text, a seemingly unrelated token is then suddenly
split up, in my example the name 'Baron' is split into 'Baro' and 'n', this is
the real problem
The problems never seem to occur when using small texts in unit tests but it
certainly does in real world examples. Depending on how many 'spurious' dots, a
completely different term can become split, or the same term in just a
different location.
I am not too sure if this is actually a problem in the Lucene code, but it is a
problem and i have a Lucene unit test proving the problem.
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