[LUCENE-7756] Only record the major that was used to create the index rather than the full version

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 7.0
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Adrien Grand
• Created: 28/Mar/17 14:35
• Updated: 28/Aug/22 15:12
• Resolved: 04/Apr/17 08:15

Description

LUCENE-7703 added information about the Lucene version that was used to create the index to the segment infos. But since there is a single creation version, it means we need to reject calls to addIndexes that can mix indices that have different creation versions, which might be seen as an important regression by some users. So I have been thinking about only recording the major version that was used to create the index, which is still very valuable information and would allow us to accept calls to addIndexes when all merged indices have the same major version. This looks like a better trade-off to me.

Issue Links

• breaks: SOLR-11406 Solr 7.0 cannot read indexes from 6.x versions