Since AEM is built on top of Apache Jackrabbit Oak and OAK uses such an older version ofSolrand by extension, lucene -- we can't support newer versions ofSolrdue to non-backwards compatible schema changes.
Solrwas upgraded to 6.6.6 here just a few months ago :
The description on that JIRA with the Apache foundation describes in more detail :
In order to support scenarios leveragingSolras an Oak index, it is recommended to upgrade to a supported version.
HavingSolr8 being released just recently, we could upgrade to that or to 7.x, however I suggest to upgrade toSolr6.6.6 which would require a more flawless update for people using 5.5.5, because 6.x is back compatible with 5.x.
Thanks for that, and that makes sense. For the application I'm building out though, we're only using Solr for MSRP for User-Generaged Content, and aren't using it as an Oak index, so I was hoping it wouldn't be bound by some of the same limitations. I see that there are solrconfig.xml and schema.xml files in 6.5 for Solr 7.x and 6.x, but not for 6.2 unfortunately.
It I think we'll just have to keep soldiering on with 5.5 for the moment, though we're still having issues going Solr standalone -> SolrCloud (nasty negativeArraySize exception that I've not yet gotten to the bottom of.)