[LUCENE-9112] SegmentingTokenizerBase splits terms that occupy 1024th positions in text

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 9.0
• Component/s: modules/analysis
• Labels: opennlp
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Markus Jelsma
• Created: 30/Dec/19 17:26
• Updated: 28/Aug/22 15:55

Description

The OpenNLP tokenizer show weird behaviour when text contains spurious punctuation such as having triple dots trailing a sentence...

1. the first dot becomes part of the token, having 'sentence.' becomes the token
2. much further down the text, a seemingly unrelated token is then suddenly split up, in my example (see attached unit test) 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.