Re: How to upgrade a core index to facilitate an upgrade

Hello Christopher, Afaik Solr 9 and 8 checks the creation version of the collection/index. Creation version does not change if you empty the collection/index and index again in a newer Solr version. IndexUpgraderTool or changing luceneMatchVersion does not change the creation version either. I che

Re: SolrCore failed to load on startup and not in cluster state

Hi All, We have upgraded the solr version from 9.6.0 to 9.6.1 and shards are became active. We tried to create a collection and collection creation also success after upgrade. During this process we noticed one of shard was down(no active leader found) So, we stopped all three nodes, And started