I recently upgraded my ElasticStack instance from 5.5 to 6.0, and it seems that some of the breaking changes of this version has harmed my pipeline. I had a script that, dep
Indices created in Elasticsearch 6.0.0 or later may only contain a single mapping type.
Indices created in 5.x with multiple mapping types will continue to function as before in Elasticsearch 6.x.
Mapping types will be completely removed in Elasticsearch 7.0.0.
Maybe you are creating a index with more than one doc_types in ES 6.0.0. https://www.elastic.co/guide/en/elasticsearch/reference/current/removal-of-types.html