I've gotten this too. It started DOSing ip addresses in China, which is a pretty funny thing for elasticsearch to be able to do. Lesson learned: don't expose el

I've gotten this too. It started DOSing ip addresses in China, which is a pretty funny thing for elasticsearch to be able to do. Lesson learned: don't expose elasticsearch directly to the internet; even though it is a REST server, it was never designed for that. At the very least take 10 minutes to write an nginx proxy around it.