https://travis-ci.org/logstash-plugins/logstash-input-elasticsearch/jobs/424562534#L1173 looks like a legit failure

for now removing this from jarvis queue unti we understand the reasons for ci failing

One of the failures is definitely a race condition in the rspec mocks that I had thought that I had eliminated, but is apparently still present.

I think the other one is too.

I'll see if I can mitigate. Testing concurrency is hard when RSpec isn't threadsafe.

I'm holding off on merging until I can finish chasing down the race condition. I am confident that it exists only in specs (the validation of partial mocks created with expect(x).to receive(y)... is not threadsafe), but am adverse to having flaky specs.

Failures here are due to rspec/rspec-mocks#1236 and will remain intermittent until that fix makes its way to a release. I have not found a way to completely eliminate without solving the underlying bug in rspec, so I will continue to chase that down.