I\'ve been using the searchkick gem with elasticsearch with no problems on a Rails 4.2.0 application. I have a single Video model using searchkick.
For some reason
Typically after hours of struggling I found the answer minutes after posting the question...
As per https://github.com/ankane/searchkick/issues/382 I added an initializer with:
Searchkick.client = Elasticsearch::Client.new(hosts: ["localhost:9200"], retry_on_failure: true, transport_options: {request: {timeout: 250}})
which seems to have solved the problem. I'll report back if it recurs.