Elasitcsearch-spark field name

Elastic Stack Elasticsearch
1

I'm generating es data with spark like below code

myParentRdd.saveToEs( Map( "es.mapping.id" -> "oid", "es.mapping.join" -> "pd_join"))
myChildRdd.saveToEs( Map( "es.mapping.join" -> "pd_join"))

This code works well but there is some deprecated logs.

Deprecated field [_routing] used, expected [routing] instead
Deprecated field [_parent] used, expected [parent] instead

Any idea with this log?

I'm using Elastics Search 6.2.2 with below libraries

compile group: 'org.elasticsearch', name: 'elasticsearch-spark-20_2.11', version: '6.2.2'
compile group: 'org.scala-lang', name: 'scala-library', version: '2.11.8'
compile group: 'org.apache.spark', name: 'spark-core_2.11', version: '2.1.2'

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