[LUCENE-9133] TermFilteredPresearcher NPE issue with empty fields

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 8.6
• Lucene Fields: New
• Assignee: Mike Drob
• Reporter: Marvin Justice
• Created: 13/Jan/20 22:35
• Updated: 15/Jul/20 15:10
• Resolved: 27/Mar/20 21:52

Description

Encountered a situation where a document contained a field value which analyzed away to nothing. The result was a NPE in TermFilteredPresearher#buildQuery. We filter out purely empty fields before creating the Document for  Monitor#match but it's hard to know up front when a non-empty field will produce zero tokens after analysis. Will follow up with a PR containing a simple unit test that triggers the NPE along with a proposed fix.

Issue Links

• links to: GitHub Pull Request #1165