elasticsearch/elasticsearch — pull request #8763 by s1monw (2014-12-03 14:43:52+00:00)
Title: [CLIENT] Add internal liveness action

This commit adds a very lightweight action to the transport
serivce that allows to fetch clustername and the discovery node
from a node. This is used by transport clients to test liveness of
a node without using the nodesinfo API which can be blocking if management
threadpools are busy.