I am using Elastic Search High Level REST API 7.x and try to access ES 6.7 index and go the following error:
ElasticsearchStatusException[Elasticsearch exception [type=illegal_argument_exception, reason=request [xxxxxxxx] contains unrecognized parameter: [ccs_minimize_roundtrips]]]
If I downgrade the API to 6.x, then the error disappears. The problem is that I have to access both 7.x and 6.x index using the REST API. So, ideally, using 7.x API should be backward compatible with 6.x. But this is not the case. Is there any concern using 6.8.1 API to access 7.x ES index?
Any advise is appreciated.