APM index not refreshing in Kibana - getting Mapper exception

Elastic Observability APM
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5

It's possible to enable dynamic mappings for headers though I would only recommend this if the number of headers is reasonably bounded. Configure apm-server.yml with:

setup.template.append_fields:
- name: "http.response.headers"
  type: object
  enabled: true
  dynamic: true

I expect all fields will then be mapped as keyword type, including those like Content-Length and Date.