Github user shimamoto commented on the issue:
https://github.com/apache/incubator-predictionio/pull/345
@chanlee514 Thanks to take a look my comment!
We work on storage support for Elasticsearch 5.x with another PR(#352).
This essentially does not require a separate build while allowing flexibility
to use a different backend support.
Perhaps we could propose a different way, which not -D parameters,
depending on the future policy of Spark and Scala support. Thus, could you
inform me of the policy if it works for you?
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