Github user pferrel commented on the issue:
https://github.com/apache/incubator-predictionio/pull/336
@marevol Thanks this looks very promising! How do you configure PIO to use
1.x vs 5.x, Templates may need to look at the config or supply their own.
The UR uses the REST API for 1.x and can easily switch to 5.X so I'd like
to coordinate.
What config flags the Elasticsearch version
`PIO_STORAGE_SOURCES_ELASTICSEARCH1_TYPE`?
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