Ah, my mistake then. For some reason, I thought the optimize would re-index the documents from the old segments into new ones, but I suppose that would only be possible for stored=true fields.
The more you know! Again, I always just did a full re-index from scratch when upgrading. On Wed, Oct 6, 2021 at 4:03 PM Shawn Heisey <apa...@elyograg.org> wrote: > On 10/6/21 6:54 AM, Dave wrote: > > Personally I always do a full reindex when going to a new version, just > safer and you should always be able to do such at any point. However if > you got the time to spare you can do an optimize and it will force the > segments all into the current version > > I'm pretty sure that even if you optimize down to 1 segment, that it > will still retain the earliest Lucene version that touched any of the > original segments. > > An index that has EVER been touched by a 6.x version will only work up > to 7.x -- 8.x will refuse to open it. This is how it's designed. > > Thanks, > Shawn > >
