I think Elasticsearch 1.6 is coming out soon. I can feel it in my bones. https://github.com/elastic/elasticsearch/issues?q=is%3Aopen+is%3Aissue+label%3Av1.6.0 I'm excited for it because it'll give a way to do Elasticsearch restarts more quickly (1 hour instead of 36). I filed https://phabricator.wikimedia.org/T101530 to enumerate the tasks for upgrading to it.
I'm so excited by it that I sent this email.
Nik