elasticsearch/elasticsearch — pull request #7721 by dakrone (2014-09-15 10:04:49+00:00)
Title: Only set `breaker` when stats are retrieved

When communicating with 1.3 and earlier nodes, it's possible that the
field data breaker info is not sent at all. When this happens, we should
leave the `breaker` variable as-is (unset) instead of creating an
AllCircuitBreakerStats object with a null fd breaker and fake request &
parent breakers.