[LUCENE-6832] SynonymFilter behaves not as expected with "ignoreCase=true"

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 5.3
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Jakob Demler
• Created: 07/Oct/15 18:51
• Updated: 28/Aug/22 14:43

Description

SynonymFilter with "ignoreCase=true" does not work as expected:

• Uppercase words in the SynonymMap are never matched
• Uppercase words will be lowercase in the resulting TokenStream regardless if being matched or not

It seems like the SynonymMap pretty much screws up if you pass it an uppercase version of a word.