Elasticsearch Version

main

Installed Plugins

No response

Java Version

bundled

OS Version

N/A

Problem Description

If using a dense_vector field with element_type set to bfloat16, no default index options are applied.

Steps to Reproduce

Create a dense_vector field with element_type set to bfloat16:

PUT test-index
{
  "mappings": {
    "properties": {
      "dense_vector_field": {
        "type": "dense_vector",
        "element_type": "bfloat16",
        "dims": 512
      }
    }
  }
}

Logs (if relevant)

No response