Github user dszeto commented on the issue:
https://github.com/apache/incubator-predictionio/pull/336
This is really great. Thanks a lot @haginot and @marevol !
Officially ES 1.7 and before are deprecated. I will start a thread in user@
and dev@ to gauge if we need to maintain backward compatibility. If it is not
too much effort, it would be nice to have two different sets of configuration
and code for ES 1.x and ES 5.x.
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