Github user nickwallen commented on the issue:
https://github.com/apache/metron/pull/1268
> @justinleet: Is it possible that the tests are more stable if we get in
#1247?
I am not sure. There might be an issue with ES's Bulk Writer refresh
policy (or the way that we use it) that we are relying on in those tests. I
ended up not relying on it for #1247 which may help, but may not solve the
entire issue if that is the root cause. That being said, this is all
speculation on my part.
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