I want to test out what changes we will need to make in version 6 when parent/child relationships are to be replaced with the new "join" data type. I downloaded elasticsearch-6.0.0-alpha2 and tried the example in the documentation: https://www.elastic.co/guide/en/elasticsearch/reference/6.0/parent-join.html
But I get the following error message:
Failed to parse mapping [doc]: [relations] expected string but was:LinkedHashMap
Anyone had any success with the new "join" data type, or is it not ready to use yet?