There is a Solr group on Linkedin actually: https://www.linkedin.com/groups/1557747/
it's administered by someone I don't know and who's not involved as a committer or PMC in any way (as far as I know): Patrick Plaatje ( https://www.linkedin.com/in/patrickplaatje/). Its main contributor is a gentleman who has polluted the group with posts that have hardly any relationship with Solr at all. You can find probably a handful of posts vaguely related to Solr in the last year or so. I thought I posted there occasionally, but couldn't find any of my posts in the last couple of years so I may be wrong. The group seems decently dead to me, not sure if recoverable, maybe it's worth starting afresh? It has a good follower base though (roughly 6k). Cheers -------------------------- *Alessandro Benedetti* Director @ Sease Ltd. *Apache Lucene/Solr Committer* *Apache Solr PMC Member* e-mail: a.benede...@sease.io *Sease* - Information Retrieval Applied Consulting | Training | Open Source Website: Sease.io <http://sease.io/> LinkedIn <https://linkedin.com/company/sease-ltd> | Twitter <https://twitter.com/seaseltd> | Youtube <https://www.youtube.com/channel/UCDx86ZKLYNpI3gzMercM7BQ> | Github <https://github.com/seaseltd>