For those who are using collective.solr to index and search plone content, which solr version are you using? The latest release of collective.recipe.solrinstance 6.0.0b3 only supports Solr up to version 4.10.6 and 5.0/5.1, but not the latest (maintained solr versions).
The solr training at last years Plone Conference in Boston (https://training.plone.org/5/solr-training/setup.html#solr-buildout) was also using solr 4.10.X using collective.recipe.solrinstance so I assume that's a stable and 'suggested' way of using solr with Plone. Or is it?
I'm asking this because at a preview instance we're sporadically seeing problems with solr on a medium Plone instance (5000 documents). where the search results page reports that "the solr search server is currently unreachable, so no results could be found". Solr itself is however not reporting any problems, I've tried to set up monitoring, but the monitoring intervals are probably to big to spot any problems. Solr seems to be gone for 10-30 seconds and then working again. So it's hard to catch and I'm wondering if an upgrade to solr is the best shot at solving this instead of trying to fix an unmaintained Solr version.
There are quite a bit of commits/fixes on collective.recipe.solrinstance since 6.0.0b3, Is anybody using the receipe with a private release from master with newer Solr versions?