Hello, I am doing upgrade of SolrCloud cluster from 6.5.0 to 8.4.1.
My process is: Upgrade to 7.7.2. Reconfigure my solrconfig to have <luceneMatchVersion>7.7.2</luceneMatchVersion>, reload collections. Delete all docs in all collections and index them again. Upgrade to 8.4.1. This step always fails for me with message in logs saying that the index format is probably created by 6.x version. My thinking is that the reindex I do in 7.7.2 is not enough. Is there a way to check in what format my index is? Any ideas if I am doing anything wrong? Thanks. Pavel Polivka
