You cannot go from 5->8 true. However, you also cannot go from 5->6->7->8. As of Lucene 8, Lucene will refuse to open an index that has ever been touched by Lucene 6, no matter whether you’ve used IndexUpgraderTool, reindexed all your data etc.
So you’ll have to plan on re-indexing from your system of record when you go to Solr 8 no matter what, so why not now? Best, Erick > On Jun 19, 2019, at 10:02 AM, ilango dhandapani <ilango.dhandap...@gmail.com> > wrote: > > In solr reference guide, I read that need to go to next major version and > cannot jump ahead next major verison, as indexes will not work. I did not > attempt from 5.3 to 7.x or 8.x though. > > Thanks, > Ilango > > > > -- > Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
