[LUCENE-6213] Add test for IndexFormatTooOldException if a commit has a 3.x segment

• Type: Bug
• Status: Reopened
• Priority: Major
• Resolution: Unresolved
• Lucene Fields: New
• Assignee: Ryan Ernst
• Reporter: Robert Muir
• Created: 30/Jan/15 23:17
• Updated: 28/Aug/22 14:24

Description

We should add a 4.x index (4.x commit) with some 3.x segment(s) to our backwards tests.

I don't think we throw IndexFormatTooOldException correctly in this case. I think instead the user will get a confusing SPI error about a missing codec "Lucene3x".